到底神马时候用that 和what (同位语从句中) 对比:) I have no idea what has happened to her . (2) Suddenly the thought came to him that he could go blind. 这两句中what 和that 可以互换吗?
用what时,从句缺成分,如上句 I have no idea what has happened to her .what作从句的主语,有时也做宾语或表语,因此从句如果缺主语、宾语或表语,就用what;that引导同位语从句时不作成分,只起连接作用。如上句that he could go blind,去掉that,意义完整he could go blind,因此从句意义完整,不缺主语、...