一般现在时变否定句

一：一般现在时怎样变否定句

一般现在时变否定句的规则：(a) 含有 am is are 的句子,变否定句时,只需在am is are 后加not.例：This is a book.否定句：This is not a book .(b) 含有实义动词的句子,变否定句分两步.（1）如果主语是第三人称单数时,要在实义动词前加doesn't,后面的动词用原形.例:He eats an apple.否定句:He doesn't eat an apple.(2) 如果主语不是第三人称单数时,只需在实义动词前加don't.例:I teach English.否定句 I don't teach English.(c) 含有情态动词的句子,变否定句时,只需在情态动词后加not.例:I can dance.否定句 I can not dance.或 I can't dance.析：当must be用来表示推测,有“一定”的含义时,否定式要用can not.例:You must say something at the mecting.You needn’t say anything at the mecting.

析：当“must+行为动词”用来表示“必须”的含义时,其否定式可用needn’t 或mustn't表示“不需要”,“不必”,语气委婉,must not表示“禁止”,“千万别”语气生硬.例：You may come in now.You mustn't come in now.

析：may作为情态动词表示“可以”时,其否定式用must not,而不用may not.例： He may watch TV .He mustn't watch TV.

注意:(1) 见到some 变否定句时,要换成any.例： I eat some apples.否定句 I don't eat any apples.(2) 见到and 变否定句时,要换成or.例：There is some air and water on the moon.否定句 There isn't any air or water on the moon.(3) 见到too和also变否定句时,要换成either.例:Tom goes to school too.否定句 Tom doesn’t go to school either.too和also用于肯定句中时,否定句中用either替换.（4 )见到already变否定句时,要换成yet.例:He has had supper already.He hasn’t had supper yet.随着对谓语动词的否定,某些副词也要作相应的变动.

二：一般现在时怎样由肯定句变一般疑问句和否定句

1，What does Daming like?

2, Does your uncle like reading English magezines?

My mother often gets up at 6:00 in the morning.

Does your mother often get up at 6:00 in the morning.

改一般疑问句

注意时态

句中有BE动词直接提前要大写

没有的话直接借用助动词 DO DID DOES

这些都要看在你用什么情况了

如

My uncle likes reading English magezines.(改为一般疑问句)

句中没有BE动词，借助DOES

动词变为原形

后面照抄

还有什么不懂的在问

大概就是这样的