This document summarizes different uses of gerunds and infinitives in English. It discusses passive gerunds and infinitives, perfect gerunds and infinitives, and the difference between simple and perfect forms. It also outlines specific constructions that gerunds and infinitives can be used in, such as after would like, expressions of time like "to be doing", after nouns formed from verbs, and after expressions involving quantifiers.

1. Complex Structures

2. Passive gerund (being done) Passive infinitive (to be done) Use: To describe actions which are done to the subject. She loves being told how beautiful she is. My car needs to be serviced

3. Perfect gerund ( having done) Perfect infinitive ( to have done) Use: when we want to emphasize an action that is completed or in the past. Having studied one language before makes it easier to learn another. By the time I’m 30 I hope to have started a business

4. Often there is no difference between a simple gerund or infinitive and a perfect gerund or infinitive. Compare: He denied stealing/having stolen the money. We were silly not to lock/not to have locked the car.

5. Perfect infinitive is used after: Would like Would love Would hate Would prefer Would rather Refers to an earlier action. I would like to see the Eiffel tower I would like to have seen the Eiffel tower

6. (to be + verb + ing) Use an action is in progress around the time of use. I’d like to be lying on the beach right now!

7. A gerund is used after certain expressions with it or there. E.g. There is no point worrying It’s not worth thinking about.

8. Used after nouns formed from verbs which take the infinitive. Agree/plan/hope etc. Our plan is to take the CAE in June.

9. After expressions with quantifiers : enough, too much, a lot etc.. Is there anything to eat? When we want to refer to the subject of the infinitive verb we use for + person or object pronoun before the infinitive. It’s very difficult for me to decide what to do.

10. After something, anywhere etc . After question words (except why) After superlatives and first, second, last etc.