Unit 9 Optimism and Pessimism
一. 教學(xué)內(nèi)容： unit 9 optimism and pessimism. lesson 4 二. 重點(diǎn)、難點(diǎn)： 語(yǔ)法
lesson 4 revise and improve infinitives &gerunds
infinitive or gerund: i like swimming. i like to swim.
gerund only: i enjoy swimming.
infinitive only: i want to go.
let’s take a look:
with some verbs, we use the verb+ an infinitive.
afford, expect, refuse, agree, hope, plan, seem, appear, learn pretend, want, decide
manage, promise
i promise to give the book back to you.
i want to watch a movie.
with some verbs, we use the verb +a gerund.
admit, finish, give up, avoid, consider, mind, delay, postpone, suggest, enjoy, put off, deny
have you finished doing your homework?
i enjoy walking in the rain.
some verbs can take either an infinitive or a gerund
begin, hate, love, like, start: there is no difference in meaning between the infinitive and gerund forms.
forget, regret, remember, stop, try: there is a difference in meaning between the infinitive and gerund forms.
i forgot going to their house. (i went there, but i forgot about it.)
i forgot to go to the office. (i was supposed to go there, but i didn’t because i forgot.)
now you try:
1. he can’t afford __________a computer. (buy)
2. it stopped __________a few minutes ago. (rain)
3. don’t forget __________your grandfather! (call)
4. did you finish __________your homework yet? (do)
5. i hope __________a good grade in english. (get)
6. i decided __________her for help. (ask)
7. it isn’t easy to give up __________chocolate. (eat)
a work by yourself
complete the sentences using infinitives or gerunds.
1. write down three activities that you like.
i like ________________________________________.
2. write down three activities that you don’t enjoy.
i dislike ________________________________________.
3. what do you think people should stop doing?
i think people should stop ____________________.
word bank
verbs take an infinitive:
afford expect refuse agree plan seem appear learn pretend
want decide