Seeing is believing. 眼见为实。
/
Helping her is my duty. 帮助她是我的责任。
动名词作主语时,句子有两种形式:
①动名词直接置于句首主语的位置上。如:
1). Playing tricks on others is something we should never do. 捉弄别人是我们万万不能干的。
2). Talking is easier than doing. 说比做容易。
用it作形式主语,把真正的主语——动名词结构移置句尾。但这种句子形式有一定的限制,作表语的只能是某些形容词或少数名词,如: It is useless/worth/no good/no use/no sense doing sth.等,如:
1). It is useless trying to argue with Shylock. 和夏洛克争辩是没有什么用的。
2). It’ s no sense arguing with her. 和她争吵没有意思。
动名词短语作主语时的谓语动词用单数形式:
Learning new words is very important for me. 学习新单词对我来说非常重要。
[练习] 用括号内所提供词的适当形式填空。
1). Talking _______ (mend) no holes.
2). _______ (walk) is a good form of exercise for both young and old.
3). Is it any good _______ (try) to explain?
Keys: 1). mends
2). Walking
3). trying
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