To infinitive or Ing?

When to use the to infinitive

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

• 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 form is always used after adjectives, for example:
- disappointed, glad, happy, pleased, relieved, sad, surprised

• I was happy to help them.
• She will be delighted to see you.

When to use -ing

The -ing form is used when the word is the subject of a sentence or clause:

• Swimming is good exercise.
• Doctors say that smoking is bad for you.

The -ing form is used after a preposition:

• I look forward to meeting you.
• They left without saying "Goodbye."

The -ing form is used after certain verbs:
- avoid, dislike, enjoy, finish, give up, mind/not mind, practise

• I dislike getting up early.
• Would you mind opening the window?

Do you want to practise? Check this website https://learnenglish.britishcouncil.org/pt-br/grammar-reference/verbs-followed-ing-or-infinitive-1