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1.It was eleven o’clock _____ they went out of the cinema.

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1.It was eleven o’clock _____ they went out of the cinema.
2.It was at eleven o’clock _____ they went out of the cinema.
A.which B.that C.when D.on which
选哪个,两个句子的区别?为什么第二道题多了个at就成强调句了.
有人知道形式主语和强调句的区别吗,我觉得这种句型很像,不容易区别。请举几个简单的例子,
答案:1 C 2 B
1.定语从句和强调句型的区别有以下两点:
1)强调句型的结构是固定的:It is/was + 被强调部分 + that/who/whom + 句子未被强调部分.
而定语从句的句子结构复杂多样,没有固定的的句型.
2)强调句型如果去掉it is/was和引导词that/who/whom后,剩下的部分可以直接构成一个完整的句子,当然有时候需要调整句序.
2.此两题都是类似结构:it is/was ...,此时只能采用第二种方法进行判断区别.
1)第一题去掉it was和需要填入的部分后,为:
eleven o'clock they went out of the cinema,调整后为:
they went out of the cinema eleven o'clock.
很明显,中间少了一个介词at,即:they went out of the cinema (at) eleven o'clock.
所以,此题不是强调句型,而是定语从句.
选择when = at which = at eleven o'clock.
2)第二题去掉it was和需要填入的部分后,为:
at eleven o'clock they went out of the cinema,调整后为:
they went out of the cinema at eleven o'clock.
这就是一个完整的句子,所以它是强调句型的句子.
而被强调部分为时间状语,所以只能用引导词that.
3.强调句型的特征我已经讲得很清楚了.
至于形式主语的结构特征太模糊了,只能说:it一般放在句首,后面一般用不定式/动名词短语/主语从句放在句尾做真正的主语.
如:It is important to learn English.
It's important learning English.
It's important that you should learn English.