问问题描述
答精选答案
1.当宾语从句表示的是科学真理、客观事实、格言或其他不受时间限制、影响的客观存在的情况时。
例如:Long ago,people didn’t know that the earth moves round the sun.很久以前,人们不知道地球是围绕着太阳运行的。It was not until then that I came to know that knowledge comes from practice.从那以后,我才知道知识来自实践主语从句，而把主语从句放到句末。此时，that也只起连接作用，但可以省略。比如，以上两个句子就存在这个问题，所以一般都会改为：It surprises us all (that) he will come to our village tomorrow.It is known to all (that) she used to be a spy. (二)如果句子是疑问句，则必须用带形式主语it的结构。如：That she is our English teacher is true. (她是我们的英语老师，是真的。)That he has been there twice is a fact. (他去过那儿两次了，是真的。)
答其他回答（2条）
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guiyangzhiyejishuxueyuan
2026-10-05 23:49:33
是强调句，例如：
1.It was then that my parents brought Grandpa to live with us.就在那时,我父母带爷爷来和我们住在一起。
2.It was just then that I chanced to look round.就在那时，我恰好环顾了下四周。
3.It was only then that I began to learn the unpalatable truth about John.直到那时我才开始了解到有关约翰的一些令人难以接受的实情。
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guiyangzhiyejishuxueyuan
2026-10-05 23:49:33
应该是强调句，强调那时
It was then that I recognized him
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本文概览：1.当宾语从句表示的是科学真理、客观事实、格言或其他不受时间限制、影响的客观存在的情况时。例如:Long ago,people didn’t know that the earth moves round the sun.很久以前,人们不知道地球是围绕着太阳运行的。It was not until then that I came to know that knowledge comes from practice.从那以后,我才知道知识来自实践主语从句，而把主语从句放到句末。此时，that也只起连接作用