1 Use the gerund of the verb in brackets:
b) in any appropriate form
1. (to speak) without (to think) is (to shoot) without aim.
2. Do you know what is peculiar about the English rule of (to drive)?
3. Excuse me for (to give) you so much trouble.
4. Since Tom was his best friend he helped him without (to ask).
5. He confessed (to forget) that he was to come on Friday.
6. Letters were no use: he had no talent for (to express) himself on paper.
7. The boys were punished for (to break) the window.
8. After (to look) through and (to sort) out the letters were registered and filed.
9. He suddenly stopped (to read). There was no point in (to go) on.
10. When they had finished (to write) this letter they read the whole correspondence from beginning to end.
11. It's no good (to deny) it. •
12. I don't remember (to ask) this question.
13. The boy was afraid of (to punish) and hid himself.
14. Then he mentioned (to be) in hospital last year.
15. She stopped (to answer) my letters and I wondered what the matter might be.
16. She reproached me for not (to keep) my promise.
17. He would never forgive her for (to play) this game, for over ten years.
18. Try and help the nurse by (to keep) quiet and tidy.
19. I don't like (to spy) on.
20. She never lost the power of (to form) quick decisions.

speaking, thinking, shooting, driving, giving, being asked, having forgotten, expressing,   breaking/having broken, looking, sorting, reading, going, writing, denying,  asking,  being punished, having been , answering,  keeping/having kept, having played, keeping, being spied, forming.