http://www.bbc.co.uk/learningenglish/english/course/intermediate/unit-11/session-2/activity-3

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

Would is used

• in the second and thid conditional,
• for the future in the past,
• in reported speech,
• for repetition in the past, and
• for polite requests.

http://www.bbc.co.uk/learningenglish/english/course/upper-intermediate/unit-4/session-1