It was in 1969 that the American went to the moon,这是强调句,强调的部分是时间,1969年。你要知道it的主语从句与强调句的主要区别是,强调句去掉it is was....that后,句子成分依然独立,就像你的例句,in 1969,the American went to the moon.
给你一个主从句子,that you need to study hard is very important.把它变为it做形式主语:it is very important that you need to study hard.如果在此句中去掉it is that就变成了:very important,you need to study hard.这个句子看起来明显就不完整。
追问那按照主语从句来理解,it做形式主语不可以吗。
追答我说实话 没懂你的意思哈
我说的是在英语里一般都把it做形式主语的情况转化为that引导的主从了。
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