主语从句表语从句宾语从句同位语从句定义/位置 + VIt + V + be / appear / seem / + Vt. / prep. / adj. + n. + 构 成that / whether + 整句; 连接代词/副词+从句剩余成分 that / whether/ as if / as though /because+整句; 连接代词/副词+从句剩余成分 that / whether (if) +整句; 连接代词/副词+从句剩余成分 that / whether +整句; 连接代词/副词+从句剩余成分 关 联 词从属连词that / whetherthat / whether;as if / as though / becausethat / whether / ifthat / whether连接代词who(ever), whom(ever), which(ever), what(ever), whose(ver)who, whom, whic