13. you ever (drive) a car? – no, this is the first time i (drive) a car. 14. the tourists just (arrive) in london and everything (be) new for them. 15. he went back to his home town and was surprised that the town (change) a lot. 16. we are late. the performance already (start) by the time we get to the theatre.

13. Have you ever (driven) a car? – No, this is the first time I (have driven) a car.
14. The tourists have just (arrived) in London and everything (is) new for them.
15. He went back to his home town and was surprised that the town (had changed) a lot.
16. We are late. The performance had already (started) by the time we got to the theatre.