在英语语法中，当一个句子中含有多个宾语从句时，可以省略一些从句的"that"，使句子更简洁。但是，第一个从句的"that"不能省略，且可以省略的情况通常是后面的从句和前面的从句有相同的主语。
下面是一个例子：
原句：I hope that you can come to my birthday party and that you will bring a gift.
省略后：I hope you can come to my birthday party and bring a gift.
在这个例子中，第二个宾语从句的that被省略了，这使得整个句子更加简洁明了。
那么，什么情况下可以省略宾语从句中的that呢？一般来说，以下两种情况可以省略：
- 第一个从句的that不能省略。例如：
原句：I know that you are smart and that you will do well on the exam.
错误省略：I know you are smart and you will do well on the exam.
正确省略：I know you are smart and will do well on the exam.
- 后面的从句和前面的从句有相同的主语。例如：
原句：She said that she loves me and that she wants to be with me.
省略后：She said she loves me and wants to be with me.
