助動詞的英語的是Auxiliary verbs

　　英語里有三個助動詞：他們分別是be, do 和 have.

　　助動詞一般出現(xiàn)主動詞前。注意是一般情況。

　　分別講一下三個助動詞的功能

　　Auxiliary be = 助動詞Be

　　功能：用來表示進行時和被動語態(tài)

　　例句：I’m waiting for Sally to come home. (進行時)

　　Her car was stolen from outside her house. (被動)

　　Auxiliary do = 助動詞do

　　功能：用來構(gòu)成和表示疑問句，否定句和強調(diào)。

　　例句：Does she live locally? (疑問)

　　They didn’t know which house it was. (否定)

　　I do like your new laptop! (強調(diào))

　　Auxiliary have = 助動詞have

　　功能：用來構(gòu)成和表示完成時。

　　例句：I’ve lost my memory stick. Have you seen it anywhere? (現(xiàn)在完成)

　　She had seen my car outside the shop. (過去完成)

　　助動詞一般和主動詞連用，剛才說是一般情況，是不是也有獨立出現(xiàn)的情況呢?

　　例子：A:Does she play the clarinet?

　　B:Yes, She does. = (Yes, she plays the clarinet.)

　　A:It hasn’t snowed at all this year, has it?

　　:No, it hasn’t. = (No, it hasn’t snowed.)

　　獨立出現(xiàn)和使用的助動詞，這里相當(dāng)于一個主動詞。

　　通過比較觀察，be|do|have作為助動詞和主動詞使用的區(qū)別。

　　例子：beShe’s a professional photographer.(主動詞)

　　He’s thinking of moving to New Zealand.(助動詞)

　　doI need to do some work this evening.(主動詞)

　　Do you like Thai food, Jim?(助動詞)

　　haveThe children have lunch at twelve o’clock.(主動詞)

　　We haven’t been to the cinema for ages.(助動詞)

　　它們?nèi)齻€做主動詞，是用來構(gòu)成問句和否定句。