agricultural英语从句用法小结

2021年1月9日发(作者：朱子奇)
英语从句用法小结
一、主语从句

★ 定义：主语从句时名词性从句中的一种，指句中的主语是一个完整的句子。
★ 位置：它可以放在主句谓语动词之前，但多数情况下由it作形式主语，而把主语从句放
在主句之后。
★ 连词：引导主语从句的连词有that, whether, 连接代词有who, what, which, 连接副词有
when, where, how, why等。
★ 例句：That she was able to come made us very happy.
Whether she will come or not is still a question.
What we need is more time.
Who will go makes no difference.
Which team will win the match is still unknown.
When they will start is not known yet.
Where she has gone is a mystery.
How this happened is not clear.
Why he did that wasn’t.
★ 引导主语从句的that不作成分，但不能省略。
★ 由it作形式主语，常用句型有：
It is +名词/形容词/过去分词+主语从句
It is still a question whether she will come or not.
It is strange that you should like him.
It is still unknown which team will win the match.
此外，还有以下常用结构：
It turned out that… 结果是…
It has been found that…已经发现…
It has been proved that…已经证明…
It happened/occurred that…恰好…
It is well-known that…据说…
It is said/reported that…据说/据报道…
It must be pointed out that…必须指出…
It doesn’t matter whether…是否…都没关系
It makes no difference whether…是否…毫无区别

二、表语从句