Here are the completed sentences using the correct form of the verbs provided:

1. It has just **started** to rain, so I’m going inside.
2. Maggie is a very good singer – she has already **won** three competitions this year.
3. They have **not finished** lunch yet because they’re still cooking it.
4. I won’t borrow that book because I **have already read** it.
5. Stand up quickly! You **are sitting** just **on** my glasses!
6. He **has not finished** his homework yet because his friend phoned while he was doing it.
7. She **has just drunk** a whole bottle of water because the race made her very thirsty.
8. You can’t have another biscuit because we **have already eaten** all of them!
9. I need a glass of water because I **have run** all the way home from school.