that从句什么时候that一定不能省啊

Question

如题所述

Answer 1

that不可省的情况：
1. 在主语从句、表语从句、同位语从句中（除宾语从句），that 不能省。如：
That the seas are being overfished has been known for years. （主语从句）
The truth is that nobody knows who invented eyeglasses. （表语从句）
We have to face the fact that land is fragile.（同位语从句）
2. 在agree, argue, hold, learn, observe, remark, suggest, indicate, conceive这种比较正式的书面语的谓语动词后，that不可省略。如：
Both candidates agree that the biggest local concern is unemployment.
Studies indicate that we have a limited amount of self-control.
3. 在it作形式宾语的宾语从句前，that不可省。如：
They found it difficult that they would finish their work in two days.
4. 在由and或or所连接的两个宾语从句时，第一个从句中的that可以省；而第二个从句中的that不能省。
It is depressing to think (that) life is purposeless and that evolution has no higher destination.

Answer 2

that引导主语从句，表语从句，同位语从句及介词后的宾语从句是不可省的。
that引导定语从句做主语，表语是不可省的。
that引导结果状语从句也是不可省的。

Answer 3

引导同位语从句，不能省略。
引导主语从句，不能省略。

请承诺O(∩_∩)O~

Answer 4

当that在从句中单任成分的时候不能省略