助动词的英语的是Auxiliary verbs

　　英语里有三个助动词：他们分别是be, do 和 have.

　　助动词一般出现主动词前。注意是一般情况。

　　分别讲一下三个助动词的功能

　　Auxiliary be = 助动词Be

　　功能：用来表示进行时和被动语态

　　例句：I’m waiting for Sally to come home. (进行时)

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

　　Auxiliary do = 助动词do

　　功能：用来构成和表示疑问句，否定句和强调。

　　例句：Does she live locally? (疑问)

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

　　I do like your new laptop! (强调)

　　Auxiliary have = 助动词have

　　功能：用来构成和表示完成时。

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

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

　　助动词一般和主动词连用，刚才说是一般情况，是不是也有独立出现的情况呢?

　　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.)

　　独立出现和使用的助动词，这里相当于一个主动词。

　　通过比较观察，be|do|have作为助动词和主动词使用的区别。

　　例子：beShe’s a professional photographer.(主动词)

　　He’s thinking of moving to New Zealand.(助动词)

　　doI need to do some work this evening.(主动词)

　　Do you like Thai food, Jim?(助动词)

　　haveThe children have lunch at twelve o’clock.(主动词)

　　We haven’t been to the cinema for ages.(助动词)

　　它们三个做主动词，是用来构成问句和否定句。