it's hard to believe that someone could have actua

问题补充：

its hard to believe that someone could have actually conjured them up.that 可以省略吗?为什么（不）可以

答案：

可以省.that引导宾语从句时,不可以省略的情况是：

1、当宾语从句前有插入语时,that不可省.例如：

We hope,as you know,that he will go abroad with us.你也知道,我们希望他和我们到国外去.

2、当宾语从句前有间接宾语时,that不可省.例如：

I told him that I had seen this movie.我告诉他我已经看过这部电影.

3、在两个并列的that宾语从句中,前面的这个that可以省略,后面的这个that不可以省略.例如：

He said (that) the book was very interesting and that(不省略) all the children like to read it.他说那本书很有趣,所有小孩都喜欢读.

4、在“it(形式宾语)+补语”之后作真正宾语的that宾语从句中,that不可省.例如：

I found it necessary that we should build a bridge here.我发现我们有必要在这里建一座桥.

5、用that从句单独回答问题时,that不可省.例如：

—What did he hear?他听说了什么事?

—That Kate had passed the exam.(他听说)凯特考试及格了.