compare with 后面加个句子该怎么表达?用that?能不能直接连一个句子，不用that

举个例子来说：
Compared with that he suffers so much, I am very lucky.
compare with 是个动词短语，后面接句子实际上也就是和宾语从句的用法一样，用that引导就可以了，或者可以省略that（见宾语从句用法）

with 后面跟宾语，短语，不能跟句子。

compare还可搭配介词to来使用

加一个重句，后面接名词，that再开始一个重句修饰这个名词

compare with + n.(名词)
pron.(代词)
doing sth.
clause(从句)
析：compare with 短语中 with 是介词,介词+ 宾语,即with +宾语,宾语可以是名词、代词、动名词、也可是从句（作宾语的句子即是宾语从句）；
当然,介词with 不能直接连接一个句子,介词没用连接从句的功能,连词才有连接从句的功能.
即 compare with + （conj.+宾语从句）；但连接宾语从句的连词that 只起连接作用,没有实际的意义,也不在从句中充当成分,因此也可省略.
例：
Compared with what he bought ,this is much better.与他买的那个比起来,这一个好多了.
He said (that) he would go the next day.句中 that 可省略.
Compared with (that) he suffers so much,I am very lucky.句中that可省略