Решение:
- I have already finished my homework. (Present Perfect: have + Past Participle).
- She has never been to London. (Present Perfect: has + Past Participle).
- Have you ever eaten sushi? (Present Perfect: Have + Past Participle).
- We have just seen this film. (Present Perfect: have + Past Participle).
- They have not cleaned the classroom yet. (Present Perfect: have not + Past Participle).
Ответ: have ... finished; has ... been; Have ... eaten; have ... seen; have not ... cleaned.