• Some verbs are not usually used in the passive. They include intransitive verbs such as appear, arrive, die, etc.
• Many verbs used statively are also not usually used in the passive. They include consist, deserve, fit, have, lack, look, mind, realise, resemble, seem, suit, etc.
• The verb let is not used in the passive when it means 'allow', although phrasal verbs with let can be used in the passive.
✓ Alice was clearly guilty, but she was let off with a warning.
• Some verbs can be followed by the bare infinitive (without to) in active sentences. They are followed by the full infinitive in passive sentences. These verbs include hear, help, make and see.
✓ We heard Jim say he was going to Albania. (active)
✓ Jim was heard to say he was going to Albania. (passive)
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