14.I am sorry students don't read English books. If they (read) them, I'd lend them some adventurevstories.
15.If he(fall) ill, he wouldn't have played tennis so well.
16.If I(take) my umbrella with me in the morning, I won't get wet.
17. If I(win), I'd have split the money with my friend.​

14. I am sorry students don't read English books. If they (read) them, I'd lend them some adventure stories.

15. If he (had fallen) ill, he wouldn't have played tennis so well.

16. If I (take) my umbrella with me in the morning, I won't get wet.

17. If I (had won), I'd have split the money with my friend.​

14. read

15. had fallen

16. take

17. had won