eg: He can swim. So can I.

　　She didn't go to class. Neither did I.

　　結(jié)構(gòu)：

　　so/neither+be+ 主語

　　so/neither+助動(dòng)詞+ 主語

　　so/neither+情態(tài)動(dòng)詞+ 主語

　　助動(dòng)詞：

　　一般現(xiàn)在時(shí): do, does/am, is, are

　　現(xiàn)在進(jìn)行時(shí): am, is, are

　　一般過去時(shí): did

　　現(xiàn)在完成時(shí): have, has

　　一般將來時(shí): will, shall

　　過去進(jìn)行時(shí): was, were

　　過去完成時(shí): had

　　過去將來時(shí): would