英语句子中把句子变化为否定句怎么变跪求
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英语句子中把句子变化为否定句怎么变跪求
英语句子中把句子变化为否定句怎么变跪求
英语句子中把句子变化为否定句怎么变跪求
1.看句子中有没有be (is/am/are...)或情态动词(can/will...)、助动词have/has/had (have /has/had done结构中或英国人表示有之意),有的话直接在其后加not.如 He is (not)a student.He can (not) swim.He has (not) been there.
2.若没有,则要在动词前加don't/doesn't/didn't(具体用哪个要看情况,第三人称单数用doesn't,过去式用didn't),特别注意加了以后,后面的动词都要用原形,如 He works here.--he doesn't work here.he worked here.--he didn't work here.
3.祈使句直接在句首加don't,如:Open the door.--Don't open the door.--Be early!= Don't be late!
另外还要注意:some 要变为any..暂时只想到这些.打字好辛苦!
先看句子种类,若是祈使句,则在句首加Don't;如果是其它句式,则看谓语部分由几个词构成,两个及以上就把第一个变否定,若只有一个动词就要借助动词。有s找does,没有s就找do,碰到过去式就找did;如果是动词不定式的话,就在(to)前加not.
不同句型,不同的方法变否定句:
1. 句子中有be 动词(is/am/are...)或情态动词(can/will...)、助动词have/has/had (have /has/had done结构中或英国人表示有之意),有的话直接在其后加not。如 He is (not)a student. He can (not) swim. He has (not) been there.
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不同句型,不同的方法变否定句:
1. 句子中有be 动词(is/am/are...)或情态动词(can/will...)、助动词have/has/had (have /has/had done结构中或英国人表示有之意),有的话直接在其后加not。如 He is (not)a student. He can (not) swim. He has (not) been there.
2.若没有,在动词前提取助动词don't/doesn't/didn't(具体用哪个要看情况,第三人称单数用doesn't,过去式用didn't),特别注意加了以后,后面的动词都要用原形,如 He works here.--he doesn't work here. he worked here.--he didn't work here.
3. 祈使句直接在句首加don't,如:Open the door.--Don't open the door. --Be early! = Don't be late!
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