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做主语和表语.动名词短语用and连起来做主语时,谓语用复数形式.例如：
Fishing in this lake is forbidden.这个湖里禁止钓鱼.
Going abroad for a visit and settling down abroadare two different things.出国访问和在国外定居是两件不同的事情.
It seems that reading English is easier thanspeaking it.似乎读英语比说英语容易.
My favorite hobby is fishing/collecting stamps.我最喜欢的爱好是钓鱼/集邮.
在It’sno use; It’s (no) good; It’s useless ; It’s (not) wise; It’s (not) worthwhile;It’s of great (no,little) importance 等习惯表达中,It为形式主语,而将做主语的动名词短语放在后面.例如：
It’s no use /good ringing her up now.现在给她打电话没用了.
Is it worthwhile bargaining two hours for two cents?为两分钱讲价两小时值得吗?
It’s wise trying again.再试一次是明智的.
It is of great importance fighting againstpollution.制止污染有重要意义.
It is no use operating on the sick man.He shouldhave been sent here early.给这个病人做手术已经没用了.本应该早些把他送来.
It is no good smoking; you’d better give itup.吸烟没好处,你最好戒掉.