【及物动词和不及物动词做主语的时候用什么形式?】
及物动词和不及物动词做主语的时候用什么形式?
【及物动词和不及物动词做主语的时候用什么形式?】
及物动词和不及物动词做主语的时候用什么形式?
一般用ing形式,为动名词做主语,也有的用todo动词不定式做主语.对动词及物或不及物无太大要求.
例(1).动名词作主语,常表示泛指意义的行为.Seeingisbelieving.Usingtherighthandtoshakehandsisaconventionmanycountries.Talkingmendsnoholes.空谈无济于事.(2).动名词在“Itisnouse/nogood/fun/awasteoftime/agoodpleasure/notanyuse/useless/worthwhile/need等词+dong”结构中作主语,it为形式主语
3.在thereisno+v.—ing----结构中,常用动名词作主语.如Thereisnosayingwhenhe'llcome.
动词不定式做主语
动词不定式作主语时,句子的谓语动词常用单数,其位置有以下两种:
(1)把不定式置于句首.如:
To
gettherebybikewilltakeushalf
(2)用it作形式主语,把真正的主语不定式置于句后,常用于下列句式中.如
①It+be+名词+todo It'sourdutytotakegoodcareoftheold.②Ittakessb+sometime+todo
②Ittakessb+sometime+todo.Howlongdidittakeyoutofinishthework
③It+be+形容词+for
sb+todo
It
isdifficultforustofinishwritingthecompositioninaquarterofan
hour.
④It+be+形容词+of
sb+todo
It
isstupidofyoutowritedowneverythingtheteachersays.
⑤It
seems(appears)+形容词+todo
It
seemedimpossibletosavemoney.
.