Unit 1 Fast Food
I.动名词的用法
Doing（V-ing）
核心思想：词性是名词，作用是动词
1. 名词
3）主语（句首）
保护环境是我们每个人的责任。
Protecting the environment is everyone’s duty.
[注]与不定式的区别
To protect the environment is everyone’s duty.
*通常情况下两者可以互换
*doing：表示经常性、习惯性的动作
*to do:表示某个特定时间段内的动作，强调目的
Postmen’s duty is delivering newspapers.
My duty this month is to deliver newspapers.
4）宾语
*动词后：动词的固定搭配，如：Enjoy doing sth
【雅思写作中常用的后跟动名词的动词】
admit, appreciate, avoid, dread, excuse, forgive, permit, recall, stop
advise, consider, fancy, postpone, recollect, give up, delay, endure, involve
practive, resent, anticipate, deny, enjoy, mind, prevent, finish, dislike
escape, resist, miss, propose, suggest, forbid, risk, can't help, can't stand
例句：
1.Teleworkers can avoid wasting their precious working time.
2.Education departments should forbid limiting the number of female students in some
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