1、本网站免费注册后即可以下载，点击开通VIP会员可无限免费下载！
2、资料一般为word或PPT文档。建议使用IE9以上浏览器或360、谷歌、火狐浏览器浏览本站。
3、有任何下载问题，请联系微信客服。
扫描下方二维码，添加微信客服
必修3《Grammar》PPT课件优质课下载
6.He left，never to return
the infinitive
不定式
to+do
1. You cannot do better than go.
2. To see is to believe.
to infinitive
bare infinitive
观察下面各句中不定式的用法，然后加以总结。
1. To answer that question is difficult.
2. To see her is to love her.
3. It is foolish to read such a book.
有时为了避免句子头重脚轻，常用it作形式主语，而把真正的主语不定式放在谓语后面。
（一）不定式可在句中作主语。
1. I decide to?make friends with you.
2. I hope to go to colleage.
3.It has no choice but to lie down and sleep.
（二）不定式可在句中作宾语。
不定式可作某些动词的宾语，常见的动词有：afford，
agree，ask，decide，desire，expect，fail，hope，manage，promise，pretend，plan，intend，refuse，wish等。
某些动词如find,feel,think,expect,consider,make等后可接不定式作宾语，宾语后要接形容词或名词作宾语补足语，而且要用it作形式宾语。
He is finding it difficult?to finish?the task.
I think it possible for us to learn English well
(三) 不定式可在句中作表语。常用来说明主语的具体内容。
1. My only wish is to do something for the public.