1. 作定语从句（that指代的是宾语）如：He is the man (that) I loved.他是我爱的人.
2. 作宾语从句,如： He said (that )he didn't know.他说他不懂.
that在连接两个句子的时候,什么情况下可以省略?
1. 作定语从句（that指代的是宾语）如：He is the man (that) I loved.他是我爱的人.
2. 作宾语从句,如： He said (that )he didn't know.他说他不懂.