动名词和不定式做主语的区别答:difficult (important, necessary) for sb. to do(2)It’s kind (good, friendly, polite, careless, rude, cruel, clever, foolish, brave) of sb. to do.3、常用动名词做主语的句型有:It’s no good (use, fun) doing.It’s (a) waste of time one’s doing.另:1)动名词作主语...