English Learner
Active voice and passive voice
Tags: BBC, active voice, passive voice, voice

http://www.bbc.co.uk/learningenglish/english/course/intermediate/unit-12/session-2/activity-3

Continuous passive
Tags: BBC, continuous aspect, verbs, voice

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

Passive voice without the agent
Tags: BBC, voice

Four situations in which the agent can be left out.

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

Present and past passive voice
Tags: BBC, verbs, voice

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