否定句是He doesn't / does not teach me English.
一、解析
首先这句话没有be 动词也没有情态动词,然后根据 teaches 判断主语是第三人称单数,并且是一般现在时。所以否定句在实意动词teaches前面加入助动词 doesn't ( does not ),动词还原为 teach 所以否定句是
He doesn't / does not teach me English.(他不教我英语。)
二、拓展——变句思路
(1)有 be ,be后面加 not
例一: He is my uncle .(他是我的叔叔)
这句话里面有be 动词 is,否定句在 be 动词 is 后面加not,is not 可以完整写,也可以缩写为 isn't
即 否定句:He is not / isn't my uncle .(他不是我的叔叔。)
(2) 有 can,can后面加 not
例二: She can dance .(她会跳舞,)
这句话里面有情态动词 can,所以否定句在can 后面加 not ,can not 可以完整写,也可以缩写为 can't
即 否定句:She can not / can't dance .(她不会跳舞。)
(3)无 be 无 can找实意动词,前面加don't 或 doesn't,此时动词需要还原
例三: She wants to go to the park .(她想要去公园。)
这句话 dances判断句子一般现在时,并且第三人称单数,所以实意动词 wants 前面加入找动词 doesn’t ,动词还原为want
即 She doesn't want to go to the park.
(4) and 变成 or,some 变成 any 。
这句话没有be 动词也没有情态动词,然后根据 teaches 判断主语是第三人称单数,并且是一般现在时。所以否定句在实意动词teaches前面加入助动词 doesn't ( does not ),动词还原为 teach 所以否定句是
所以否定句是 He doesn't / does not teach me English.(他不教我英语。)
三、拓展训练
把下面句子改为否定句
1 I am a student.
否定句:I am not a student.
2 She likes cats.
否定句:She doesn't / does not like cats.
首先更正一下,正确的应是“teaches ”而不是“teachers ”。
原句:He teaches me English.(他教我英语。)
改为否定句:He doesn't teach me English.(他不教我英语。)
英语中陈述句改为否定句怎么改?
1、句中有be动词(am/is/are/was/were)的,在be动词后加not。
如:I can swim.——I can't swim.
He is a math teacher. → He is not a math teacher.
2、句中有情态动词的(can/should/must/would),在情态动词后面加not;
如:There will be a new building next year. → There will not be a new building next year. (will not可以缩写为won’t)
3、句中没有be动词和情态动词的,在动词前加don’t或doesn’t
① 句中动词为原形的,加don’t .如: I like apples. I don’t like apples.
②句中动词为三单式的,加doesn’t,并将三单式的动词还原成原形。
如:He likes apples. He doesn’t like apples.
4、肯定句中的some在否定句中应改为any
如:There are some students in the classroom. There are not any students in the classroom.
特殊形式的否定句:
(1)肯定句含有every-的合成词时,变否定句时改为no-。
如:Everything is ready.→Nothing is ready.
(2)肯定句中含有always, usually和ever时,变否定句时改为never。
如:He is always late for school.→He is never late for school.
(3)肯定句含有many,much时,变否定句时分别改为few,little。
如:Many students know him.→Few students know him.
(4)肯定句中含有still时,变否定句时应改为no longer。
如:Tom is still in bed.→Tom is no longer in bed.
(5)肯定句含有both, both...and,all时,变否定句时应改为never,neither...nor,none。
如:Both of us are students.→Neither of us is a student.
(6)肯定句含有nearly, almost时,变否定句时应改为 hardly。
如:Lily nearly knows him .→Lily hardly knows him .
(7)肯定句含有“形容词+ enough”时,变为否定句时应改为“too +形容词的反义词”。
如:He is short enough to reachit.He is too tall to reach it.