1. INFINITIVE vs. –ING forms

2. INFINITIVE
To express purpose:
She went to the bank to get money.

3. INFINITIVE
After certain verbs: advise, agree, decide, hope, promise, refuse, seem, want etc.
She decided to wait for a better offer.

4. INFINITIVE
After verbs like know, decide, ask, learn, remember followed by WH- words:
I can’t decide where to go on holiday.

5. INFINITIVE
After adjectives like: sorry, happy, glad, afraid, ashamed etc.
She was glad to be back.

6. INFINITIVE After too and enough: She is too sad to talk right now.
She was frightened enough to keep silent.

7. -ING form
As a noun:
Swimming is a pleasant activity.

8. -ING form After certain prepositions: with, without, of
She left without saying a word.

9. -ING form
After certain verbs: consider, avoid, deny, look forward to, involve, mention, risk, mind, regret, admit, suggest, imagine etc.
They avoided speaking to each other all day long.

10. -ING form
After go for activities:
They went camping.

11. -ING form
After: it’s no use, it’s (not) worth, it’s no good, be busy, there’s no point in, can’t help, can’t stand, be/get used to, have difficulty in
I can’t stand waiting in a queue.

12. -ING form After: like, love, enjoy, hate, dislike, prefer etc
She likes going for long walks.

13. INFINITIVE or -ING form?
NO change in meaning
begin, start, continue, allow, permit, recommend, need, require
They began to speak / speaking in a lower voice.
They don’t allow parking / us to park here.

14. INFINITIVE or -ING form?
b) With a change in meaning
like + infinitive = preference
like+ -ing = enjoy
I like to keep my room clean.
I like swimming.

15. INFINITIVE or -ING form?
stop + infinitive = cease an activity in order to do something else
stop + -ing = cease / interrupt an activity
They stopped to greet each other.
They stopped laughing because they were too loud.

16. INFINITIVE or -ING form?
try + infinitive =make an attempt
try + -ing = try as a solution
I tried to speak louder, but I failed.
I tried speaking English to him because he didn’t understand my language.

17. INFINITIVE or -ING form?
remember + infinitive = remember to do an activity
remember + -ing form = remember already performing an activity
I must remember to water the plants.
Ok, I now remember watering the plants.

18. INFINITIVE or -ING form?
forget + infinitive = not doing an activity
forget + -ing = activity is done and forgotten about
I forgot to tell her to water the plants.
I forgot telling her to water the plants, so I did it again.

19. INFINITIVE or -ING form?
hear / see / watch / listen + -ing = witnessing a performing action
I heard him talking on the phone.
hear / see / watch / listen + infinitive= witnessing the whole process
I heard him talk on the phone.