Sometimes we need to decide whether to use a verb in its: -ing form (doing, singing) or infinitive form (to do, to sing). For instance, only one of the following sentences is correct. Which one? I’ve just decided buying a new car. (?) I’ve just decided to buy a new car. (?)
When to use the 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, recommend - allow, can/can't afford, decide, manage, mean, refuse I agreed to go with her. He decided to leave the party early. Why are they encouraged to learn English? We can't afford to take a long holiday. ! For the negative form we use “not” before the infinitive: I agreed not to go with her.
The infinitive form is always used after adjectives, for example: - disappointed, glad, happy, pleased, relieved, sad, surprised I was happy to help them. This includes too + adjective: The water was too cold to swim in. The infinitive form is used after adjective + enough: She is rich enough to buy two.
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, deny, postpone, fancy, admit, miss, involve, imagine I dislike getting up early. Would you mind opening the window? ! For the negative form we use “not” before the gerund: Would you mind not opening the window? It’s cold outside.
Gerund and infinitive Some verbs can be followed by the -ing form or the infinitive without a big change in meaning: begin, continue, hate, intend, like, love, prefer, propose, start. It started to rain / It started raining. I like to play tennis / I like playing tennis.
Fill in the blanks with the infinitive or ing form 1. We like ______ our grandmother on Sundays. (visit) 2. It wasn’t a nice day, so we decided _____ for a walk. (not go) 3. My father hates _____a tie to work. (wear) 4. We can't afford ______ a vacation this summer. (take) 5. The company was pleased ______ your thank-you letter. (receive) 6. Our neighbour threatened _______ the police. (call) 7. I hope ______ a job soon. (find)
8. Would you mind _____ a window? (open) 9. She was too proud _____ the truth. (tell) 10. She cannot leave the table without ______ her dinner. (finish) 11. The music will continue _______until you turn it off. (play) 12. My little brother dislikes ______his hair brushed. (not have) 13. Men aren’t very good at ______ women’s thoughts. (guess) 14._________ is bad for your health. (smoke)