Simple, continuous, perfect and perfect continuous.

http://www.bbc.co.uk/learningenglish/english/course/towards-advanced/unit-30/session-1

http://www.bbc.co.uk/learningenglish/english/course/towards-advanced/unit-24/session-1

http://www.bbc.co.uk/learningenglish/english/course/upper-intermediate/unit-15/session-1

http://www.bbc.co.uk/learningenglish/english/course/upper-intermediate/unit-12/session-1

We use the future continuous, will + be + present participle,

• to talk about events that will be in progress at a particular time or over a period of time in the future,
• to talk about events that will happen in the normal course of things, and
• to politely enquire about a person's plans for the future.

We use be + to-infinitive to talk about future events which involve instruction or necessity.

http://www.bbc.co.uk/learningenglish/english/course/intermediate/unit-22/session-2/activity-3

http://www.bbc.co.uk/learningenglish/english/course/towards-advanced/unit-10/session-1

Five ways to talk about the future in the past.

http://www.bbc.co.uk/learningenglish/english/course/towards-advanced/unit-15/session-1

The future perfect continuous, will + have + been + present participle, emphasises that an action or a repeating series of actions started before a time in the future and is still happening at that time in the future.

http://www.bbc.co.uk/learningenglish/english/course/intermediate/unit-30/session-2/activity-3

The future perfect, will + have + past participle, is used to talk about a time in the future by when a particular activity will be completed.

http://www.bbc.co.uk/learningenglish/english/course/intermediate/unit-26/session-2/activity-3

http://www.bbc.co.uk/learningenglish/english/course/upper-intermediate/unit-13/session-1

http://www.bbc.co.uk/learningenglish/english/course/upper-intermediate/unit-13/session-4

Different ways of talking about the future.

• will for statements about the future, for predictions about the future, and for instant decisions made at the time of speaking.
• be going to for present situations that extend into the future, for predictions based on present, physical evidence, and for plans.
• on the verge/brink of for events that are going to happen very soon.
• be about to for events that will happen in the near future.
• be sure/bound to for events we are confident will happen.
• be to for talking about the future in formal way.
• be due to for scheduled events.
• present simple for timetabled future events.
• present continuous for arrangements.
• future continuous for activities which are in progress at a future time.
• future perfect for actions completed before a specific future time.
• normal verbs with a future meaning like hope, plan, aim, intend, arrange, decide, etc.

http://www.bbc.co.uk/learningenglish/english/course/intermediate/unit-17/session-2/activity-3

http://www.bbc.co.uk/learningenglish/english/course/upper-intermediate/unit-24/session-1

http://www.bbc.co.uk/learningenglish/english/course/towards-advanced/unit-2/session-1

http://www.bbc.co.uk/learningenglish/english/course/upper-intermediate/unit-24/session-4

Verbs which change meaning when followed by the gerund or infinitive form.

http://www.bbc.co.uk/learningenglish/english/course/towards-advanced/unit-9/session-1

We use infinitives of purpose to explain why we're doing something.

http://www.bbc.co.uk/learningenglish/english/course/towards-advanced/unit-6/session-1

http://www.bbc.co.uk/learningenglish/english/course/upper-intermediate/unit-5/session-1

http://www.bbc.co.uk/learningenglish/english/course/lower-intermediate/unit-3/session-2/activity-4

Link verbs are followed by a word that gives information about the subject itself.

https://learnenglish.britishcouncil.org/en/english-grammar/clause-phrase-and-sentence/verb-patterns/link-verbs http://dictionary.cambridge.org/grammar/british-grammar/about-verbs/verbs-types#verbs-types__2

http://www.bbc.co.uk/learningenglish/english/course/upper-intermediate/unit-22/session-4

Narrative tenses are used to describe events that happened in the past, and for telling stories.

http://www.bbc.co.uk/learningenglish/english/course/intermediate/unit-20/session-2/activity-3

http://www.bbc.co.uk/learningenglish/english/course/upper-intermediate/unit-26/session-1

We use this form when we talk about something that must be done, but we choose not to say who needs to do it. This is often because the person who needs to do it is unknown, obvious or unimportant.

http://www.bbc.co.uk/learningenglish/english/course/upper-intermediate/unit-14/session-1

Five ways to use the past for the present or future.

http://www.bbc.co.uk/learningenglish/english/course/towards-advanced/unit-8/session-1

The past perfect continuous, had + been + present participle, describes an action which started in the past and continued up to another point in the past.

http://www.bbc.co.uk/learningenglish/english/course/intermediate/unit-14/session-2/activity-3

The past perfect, had + past participle, describes something that happened before an action described using past simple.

http://www.bbc.co.uk/learningenglish/english/course/intermediate/unit-7/session-2/activity-3

The past simple is used to describe an action that happened and finished in the past.

The past continuous, was/were + present participle, is used to describe an action that was in progress at a particular time in the past but not completed.

http://www.bbc.co.uk/learningenglish/english/course/lower-intermediate/unit-7/session-2/activity-4

The past simple describes an action that happened and finished in the past.

http://www.bbc.co.uk/learningenglish/english/course/lower-intermediate/unit-6/session-2/activity-5

http://www.bbc.co.uk/learningenglish/english/course/intermediate/unit-4/session-2/activity-3

http://www.bbc.co.uk/learningenglish/english/course/intermediate/unit-21/session-2/activity-3

http://www.bbc.co.uk/learningenglish/english/course/upper-intermediate/unit-23/session-1

http://www.bbc.co.uk/learningenglish/english/course/upper-intermediate/unit-23/session-4

http://www.bbc.co.uk/learningenglish/english/course/upper-intermediate/unit-27/session-1

We use might, may or could to talk about the possibility of something in the present or the future, when we are making a guess about a present situation, or we aren't sure if something will happen in the future.

We use might not and may not to talk about negative possibility. We don't use counld not in the same way as might not and may not. Could not means that something is impossible.

http://www.bbc.co.uk/learningenglish/english/course/lower-intermediate/unit-16/session-2/activity-3

http://www.bbc.co.uk/learningenglish/english/course/lower-intermediate/unit-22/session-2/activity-3

We can use the present continuous, be + present participle, to talk about the future when we have already arranged to do something.

We can use be + going + to-infinitive to talk about something that we have decided to do in the future, but not arranged yet.

http://www.bbc.co.uk/learningenglish/english/course/lower-intermediate/unit-9/session-2/activity-3

Using the present to talk about the past.

http://www.bbc.co.uk/learningenglish/english/course/towards-advanced/unit-3/session-1

The present perfect is used for life experiences, recent past actions that are important now, past situations that are still happening now, and answering 'How long' questions usually with for or since.

The past simple is used for completed actions in the past.

http://www.bbc.co.uk/learningenglish/english/course/lower-intermediate/unit-26/session-2/activity-3

The present perfect continuous, have + been + present participle, is used to describe an activity that started in the past and is continuing now or has recently finished.

http://www.bbc.co.uk/learningenglish/english/course/intermediate/unit-2/session-2/activity-3

• ever: at any time in someone's life.
• never: not at any time in someone's life.

http://www.bbc.co.uk/learningenglish/english/course/lower-intermediate/unit-11/session-2/activity-5

The present perfect is often used with

• for meaning throughout a period of time or
• since meaning from a point in time to now

to talk about situations that started in the past and are continuing now.

http://www.bbc.co.uk/learningenglish/english/course/lower-intermediate/unit-12/session-2/activity-4

The present perfect is often used with

• just for something that happened only a short time ago,
• already when an action has happened before now or before we expected it to happen, and
• yet to ask if something has happened before now or to say something has not happened up to now.

http://www.bbc.co.uk/learningenglish/english/course/lower-intermediate/unit-14/session-2/activity-3

The present simple is used to describe things that we do regularly, facts, habits, truths and permanent situations.

The present continuous, be + present participle, is used to describe things that are happening at the time we are speaking, temporary situations and activities that are in progress. Stative verbs are not usually used in the present continuous.

http://www.bbc.co.uk/learningenglish/english/course/lower-intermediate/unit-2/session-2/activity-3

We use the present simple tense for things that we do regularly and for facts, habits, truths and permanent situations.

We use the present continuous for things that are happening at the time we are speaking, for temporary situations, and for activities that are in progress.

We use the present perfect for life experiences in the past, recent past actions that are important now, and past situations that are still happening now, often with how long, for and since; with just, already, yet for recent events.

http://www.bbc.co.uk/learningenglish/english/course/intermediate/unit-1/session-2/activity-3

Action verbs describe things we do or things that happen. Action verbs can be used in all tenses.

State verbs describe attitudes, thoughts, senses or belonging. Sometimes, state verbs can also describe actions. Most state verbs are not used in the continuous form.

http://www.bbc.co.uk/learningenglish/english/course/lower-intermediate/unit-25/session-2/activity-3

Some state verbs can be used in the continuous form

• with the adverbs forever, always and constantly to show annoyance about a repeated habit,
• to make requests and questions more polite and less direct,
• to emphasise a strong feeling at the moment of speaking, and
• in some idioms and set phrases.

http://www.bbc.co.uk/learningenglish/english/course/towards-advanced/unit-5/session-1

http://www.bbc.co.uk/learningenglish/english/course/towards-advanced/unit-20/session-1

http://www.bbc.co.uk/learningenglish/english/course/towards-advanced/unit-21/session-1

http://www.bbc.co.uk/learningenglish/english/course/towards-advanced/unit-22/session-1

http://www.bbc.co.uk/learningenglish/english/course/upper-intermediate/unit-20/session-1

We use the present simple for things that we do regularly and for permanent situations.

We use the present continuous for things that are happening now and for temporary situations.

We use the past simple tense when an action or situation happens and finishes in the past.

We use the present perfect to talk about our experiences in the past often with ever or never; to talk about situations that started in the past and are continuing now often with how long, for or since; to say whether an action has happened or not at the present time with just, already or yet.

We use the present continuous to talk about the future when we have made an arrangement to do something.

We use be going to + infinitive for future plans.

http://www.bbc.co.uk/learningenglish/english/course/lower-intermediate/unit-20/session-2/activity-3

Subject + used to + infinitive is used to refer to things in the past which are no longer true. It can refer to repeated actions or to a state or situation.

Subject+ would + infinitive is used only for repeated actions, not for a state or situation.

http://learnenglish.britishcouncil.org/en/quick-grammar/past-habit-used-towouldpast-simple http://dictionary.cambridge.org/grammar/british-grammar/past/used-to

• used to + infinitive refers to actions and situations in the past which no longer happen or are no longer true.
• be used to + noun/pronoun/gerund means 'be accustomed to' or 'be familiar with'.
• get/become used to + noun/pronoun/gerund means 'become accustomed to' or 'become familiar with'.

http://learnenglish.britishcouncil.org/en/quick-grammar/used-infinitive-and-beget-used http://dictionary.cambridge.org/grammar/british-grammar/past/used-to

Subject + used to + infinitive is used to refer to things in the past which are no longer true. It can refer to repeated actions or to a state or situation.

Negative form

• Subject + didn't use to + infinitive
• Subject + never used to + infinitive
• Subject + used not to + infinitive

Question form

• Did + subject + use to + infinitive?

• verb + to-infinitive
• verb + gerund
• verb + that clause

http://www.bbc.co.uk/learningenglish/english/course/lower-intermediate/unit-10/session-2/activity-3

http://www.bbc.co.uk/learningenglish/english/course/intermediate/unit-29/session-2/activity-3

Five ways to use wish.

http://www.bbc.co.uk/learningenglish/english/course/upper-intermediate/unit-16/session-1

http://www.bbc.co.uk/learningenglish/english/course/towards-advanced/unit-23/session-1

• wished for the past: subject + wish + subject + past subjunctive
• wished for the present: subject + wish + subject + past perfect

http://www.bbc.co.uk/learningenglish/english/course/upper-intermediate/unit-16/session-4