Unit 5 - Grammar Exercises Exercise 3 Use present perfect tense after “because”.#1. Hamida can’t walk very fast. (hurt / leg) #2. I can’t get in the house. (lose / key) #3. I know this story very well. (see the film) #4. I can’t post the letter. (not put / stamp / on it) #5. Atabek can’t stand up. (eat too much) #6. They can’t go on holiday to Paris. (not save / money) #7. I know Mrs Farida well. (meet him before) #8. We don’t know how Mr Axmed is. (not hear from him) #9. Anvar won’t take a cigarette. (give up smoking) #10. Salamat can’t get in. (he / lock the door) next Results