主语从句that绝对不能!因为句子是不能作主语的,故用that引导.若去掉则没了主语.宾语从句that可省.
主语从句:That he is right is known to all of us.
宾语从句:We all know (that) he is right.
主语从句that绝对不能!因为句子是不能作主语的,故用that引导.若去掉则没了主语.宾语从句that可省.
主语从句:That he is right is known to all of us.
宾语从句:We all know (that) he is right.