It is important_________ English.A.learningB.to learnC.having learnedD.to have learnedto learn 我想问下为什么不能用A.learning作主语?

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Itisimportant_________English.A.learningB.tolearnC.havinglearnedD.tohavelearnedtolearn我想问下为什么不能用A.le

It is important_________ English.A.learningB.to learnC.having learnedD.to have learnedto learn 我想问下为什么不能用A.learning作主语?
It is important_________ English.
A.learning
B.to learn
C.having learned
D.to have learned
to learn 我想问下为什么不能用A.learning作主语?

It is important_________ English.A.learningB.to learnC.having learnedD.to have learnedto learn 我想问下为什么不能用A.learning作主语?
这个句子是主系表结构.it是形式主语,is是系动词,important是形容词作表语,后面的不定式to learn English是真正的主语指前面的it.这是一种固定的表达结构:it is+形容词+to do sth.什么东西怎么样.这句中意思就是“学英语很重要.”

be important to do sth. 译为“做...是很重要的”。

to do 通常指动作将要发生;doing通常指已经完成
例如:
刚碰到一个人时说:nice to meet you
跟这个人聊完后,要分手会说:nice meeting you

B.to learn
是对英语做什么很重要?
是去读英语很重要

It is important to learn English.

it is important to do sth
固定搭配~

it is important to do sth.

to learn
of learning

It is+adj to do是一个固定结构,表"做某事很..."其中it作形式主语,真正的主语是to do,如果用learning句中就出现两个主语了

be important to do sth. 是一个固定用法