Make sentences in the present perfect affirmative or negative, using these past...

Question

Make sentences in the present perfect affirmative or negative, using these past participles.
(Done, lost, arrived, built, put , made, changed)
1. I can't find my mobile. I think I _____ it.
2. this isn't right. he____ s mistake.
3. I can't go to bed. I _____ my homework.
4. Martin and Lizzie are here but Jay ____.
5. look! they ____ a little house in the tree.
6. Helen ____ the colour of her hair. she looks completely different.
7. you ___ the butter in the fridge. look! it's melting.
помогитеееее!!!!

Answer 1

1. I can't find my mobile. I think have I lost it.
2. This isn't right. He  has made mistake.
3. I can't go to bed. I haven't done my homework.
4. Martin and Lizzie are here but Jay hasn't arrived.
5. Look! They have built a little house in the tree.
6. Helen has changed the colour of her hair. She looks completely different.
7. You haven't put the butter in the fridge. Look! It's melting.