二,句型转换,-|||-1, John stayed at home last night改为否定？
原句：John stayed at home last night.（约翰昨晚呆在家里。）
改成否定句：John did not stay at home last night.（约翰昨晚没有呆在家里。）
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.
John didn't stay at home last night.
昨天晚上约翰没有呆在家。
