The gerund
When a verb ends in -ing, it may be a gerund or a present participle. It is important to understand that they are not the same.
When we use a verb in -ing form more like a noun, it is usually a gerund:
- Fishing is fun.
When we use a verb in -ing form more like a verb or an adjective, it is usually a present participle:
- Anthony is fishing.
- I have a boring teacher.
The infinitive form is used after certain verbs:
- forget, help, learn, teach, train
- choose, expect, hope, need, offer, want, would like
- agree, encourage, pretend, promise
- allow, can/can't afford, decide, manage, mean, refuse
- forget, help, learn, teach, train
- choose, expect, hope, need, offer, want, would like
- agree, encourage, pretend, promise
- allow, can/can't afford, decide, manage, mean, refuse
- I forgot to close the window.
- Mary needs to leave early.
- Why are they encouraged to learn English?
- We can't afford to take a long holiday.
The infinitive
The infinitive form is always used after adjectives, for example:
- disappointed, glad, happy, pleased, relieved, sad, surprised
- disappointed, glad, happy, pleased, relieved, sad, surprised
- I was happy to help them.
- She will be delighted to see you.
This includes too + adjective:
- The water was too cold to swim in.
- Is your coffee too hot to drink?
The infinitive form is used after adjective + enough:
- He was strong enough to lift it.
- She is rich enough to buy two.