1. be動詞（am/is/are）

　　主語 be動詞（原形） be動詞（過去式）

　　I am was He/she/it is was

　　We/you/they are were

　　2.助動詞（do/does/did）

　　問句 答句

　　Do+非第三人稱單數(shù)

　　＋動詞原形…?

　　…do/don't

　　Does+第三人稱單數(shù)

　　…does/doesn't

　　Did+所有主格

　　…did/didn't

　　問句 答句

　　What do you/they/we…

　　+動詞原形？

　　I/They/We+動詞原形…。

　　What does he/she/it…

　　He/She/It +(動詞＋S)….

　　What did you/they/we/ he/she/it…

　　I/They/We/ He/She/It +動詞過去式。