怎么判断英语中强掉句和主语从句{用IT作形式主语,THAT放后面的主语从句}

Question

如题所述

Answer 1

原句：The doctor helped the children a lot when they were in hospital.
强调句：It is +将原句中被强调的部分+that+原句剩余部分。
主语从句：【That +原句 】（充当主语）+（主句的）谓语部分
主语从句后置：It +（主句的）谓语部分+that +原句 】
例1. It is known to us all that the doctor helped the children a lot when they were in hospital.
例2. It is the doctor that helped the children a lot when they were in hospital.

Answer 2

要点！强调句的句子不缺任何成分，是完整的

主语从句很好判断

Answer 3

将句子中的 it is/was that 去掉看能否成为一个句子，如果是句子的话就是强调句，反之则不是。