什么时候用does
归纳起来, do ,does 的用法有四方面:
用作一般的动词,均可。do是一不规则变化的动词(do ,did,done)。
do,据人称和单复数的不同而有字形的变化。第一第二人称,以及第三人称的复数时,都用 do。
第三人称单数时,用 does( he does she does it does )
例如: I do my homework on Sunday.
You do your homework on Sunday.
We do our homework on Sunday.
You do your homework on Sunday.
They do their homeworkon Sunday.
He does his homework on Sunday.
She does her homework on Sunday.
二.当助动词用,用它来构成疑问句.这时它本身没有实义,只是一个构成疑问句的符号而已.这种用法时,它随人称和数的变化规则与上述相同,只是把它放到句子的最前面(句首)。例如:
Do I ...............?
Do you .............?
Do we ..............?
Do you .............?
Do they ............?
Does he ............?
Does she ...........?
Does it ............?
三.当助动词用,与 not 连用使句子构成否定句。其随人称和数的变化规则与上述相同。例如:
I do not ..................? (do not 可简化为 don't ,下同)
You do not ................?
We do not..................?
You do not.................?
They do not................?
He does not................? (does 可简化为 doesn't,下同)
She does not...............?
四.当作助动词,本身在句子中无实义,只是加强句子中动词的语气,其随人称和数的变化同上。例如:
Do write to me.(一定写信给我!)
Never do I see such a fool.(我从来没见过这样的蠢才.)
She does come.(她的确来了.)
按词性,do 还可以用作名词。其意是"欺骗";"宴会,宴请"。例如:
It's all a do.(完全是欺骗.)
We have got a do on to-night.(家里今晚请客.)
助动词do和does的用法 助动词do和does怎么用
作为实义动词/行为动词,都是“做”的意思,都是一般现在时,主语是第三人称单数用does,其余人称用do;
作为助动词,没有意义,构成疑问句,主语是第三人称单数用does,其余人称用do,后面的动词都用原形。如:
I/We/They do my homework every day.(do是实义动词)
我/我们/ 他们每天做作业。
He/She does his/her homework every day.(does是实义动词)
他/她每天做作业。
Do you get up at seven every day?(do是助动词)
你每天7点钟起床吗?
does的否定形式 does否定形式是什么
does的否定形式是does not,可以缩写成“doesn't”。does是一个英语词汇,是do的第三人称单数形式。例句:He does sports in the morning;Li Ming doesn't like reading books。
does的否定形式
not 表示否定,为否定句基本形式。句型为主语+联系动词be+表语:在be(am/are/is/was/were)后面加 not 即构成否定句。句型为主语+助动词(be,have和will)+谓语动词:在(be, have和will)后面加 not 即构成否定句。句型为主语+情态动词(can,could,may,might,must,should等)+谓语动词:在情态动词(can,could,may,might,must,should等)后面加 not 即构成否定句。
句型为主语+谓语动词(谓语前没有助动词):在谓语动词前加助动词do/does/did not即构成否定句,谓语动词用原形。还有一种特殊情况,那就是not用在谓语动词外的其它句子成分前。说明︰主要是用在两种情形:一是不这样安排 not,句子有歧义;二是用于含有对比的叙述中。
|什么时候用does
does否定形式 does的否定形式 什么时候用does 助动词do和does怎么用 助动词do和does的用法