Unit 9 Optimism and Pessimism

一. 教学内容： unit 9 optimism and pessimism. lesson 4   二. 重点、难点：     语法

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 dif