that引導賓語從句無意義,不充當句子成分常省略.但下列情況除外：

（1）介詞賓語從句的that不省略

（2） and連線的幾個從句,第二個從句以後的從句的that不省略.He told me that he had two sons and that they both had gone to college.

（3）在動詞+it+賓語補足語+賓語從句結構中,that不省略.I heard it said that he had gone abroad We found it impossible that he could finish it in such a short time

that引導賓語從句無意義,不充當句子成分常省略.但下列情況除外：

（1）介詞賓語從句的that不省略

（2） and連線的幾個從句,第二個從句以後的從句的that不省略.He told me that he had two sons and that they both had gone to college.

（3）在動詞+it+賓語補足語+賓語從句結構中,that不省略.I heard it said that he had gone abroad We found it impossible that he could finish it in such a short time