Rewrite the sentences replacing the relative clauses with participle clauses.

1 A painting which belongs to the Queen has been stolen. 2 These beautiful costumes, whic. h have been worn by

famous opera singers, are for sale.

7. I have (lost/been loosing) my note-book. Have you (seen/been seeing) it anywhere? 8. Someone has (eaten/been eating) my sweets. They are nearly all gone. 9. I have (waited/been waiting) for you for ages! Where have you been? 10.

Choose the right tense form. Nina has been learning/has learned English for 2 years. The birds have already flown/have been flying to the South. They have known / have been knowing him for many years.

A. Read the sentences and say how can form negations in present perfect I have been to London We have been to Washington You have been to Boston They have been to Chicago She has been to Australia He has been to the USA I have not been to Moscow We

a) Mike can't have stolen / might steal / must have stolen / could steal the necklace as his finger prints were fund all over it.

Yesterday, I left the car unlocked. It ..., but luckily it wasn't. a) could have been stolen b) might have been stolen c) must have been stolen d) can't have been stolen