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动词不定式作主语的用法

2025-01-27 01:26:34浏览:
动词不定式作主语的用法  【小编寄语】遥查字典英语网小编教给同学们的是动词不定式作主语的用法,一起来学习下吧!
祝同学们学习进步!
  一、不定式等非谓语形式作主语时,谓语动词一路走来都是单数身份;不少作主语的不定式与动名词在意义上相同。
如:   To see is to believe.
= Seeing is believing.
眼见为实。
  二、口语中,当作主语的不定式过遥,it不惜屈居有名无实的形式主语,常为平衡关系而挺身而出、替主出征,遥角反无官一身轻,悠哉断后。
如:   To learn a foreign language well is not easy.
→ It's not easy to learn a foreign language well.
要把一门外语学好不容易。
  To play football is very interesting.
→ It's very interesting to play football.
踢足球很有趣。
  留言提醒:在实际操作中,不定式(短语)还有权招聘一个逻辑主语,并由of / for出面料理--It's + adj.
+ for / of sb.
+ to do sth.
,下例中的for me即是:   It's hard for me to finish the task in such a short time.
对我而言,要在如此短的时间里完成任务是困难的。
  聘of还是for?
点击作表语的形容词属遥可知:若形容词描述的是人的特征与品行,能修饰人(像kind, nice, good, clever, right, polite, careless等),则of适宜;如果形容的是事物的特点或外观等(如easy,hard / difficult, safe, interesting, important,necessary之类),则for主动上!
下例正误可略见一斑:   出席这个会议对你来说很重要。
  [误] It's very important of you to attend the meeting.
  [正] It's very important for you to attend the meeting.
  留言提醒:检验形容词描绘的是不是人的特征与品行、能否修饰人--sb.
be adj.
可助上一臂之力。
  三、一个都不能少:还有几种耳熟能详的不定式作主语句式。
如:   1.
It takes / took / will take (sb.
) some time to do sth.
如:   It takes (us) hours to do our homework every day.
我们每天要花上数小时做家庭作业。
  2.
It's + n.
+ to do sth.
如:   It's a mistake for us not to help him.
我们不帮他是个错误。
  留言提醒:要对不定式否定,暗号照旧--not在不定式前面加!
  3.
It cost / costs sb.
some time / money to do sth.
如:   It cost me ten yuan to buy this bag.
我花了十元遥买这个书包。
  四、时代流行风--主语也能由疑问词how / what / when / where / which等携手与不定式联袂出演。
如:   Where to put the bikes is being discussed.
把自行车放哪儿正在讨论当中。
  When and where to have the meeting hasn't been known.
什么时候、什么地方开会还是未知数。