含有情态动词句子变否定句 含有be动词和情态动词的句子,怎么变否定句和一般疑问句

1.含有be动词和情态动词的句子,怎么变否定句和一般疑问句

改成否定句方法：

1、找到be动词或是情态动词

2、在后面加上not

改成一般疑问句方法：1、找到be动词或是情态动词

2、把be动词或是情态动词提前

3、其余照抄

例子：

(1)You are(be) a student.

改成否定句，在be动词后面加not

You are not a student.

改成一般疑问句，把be动词提前

Are you a student?

(2)You can do it.

改成否定句，把情态动词can后面加上not

You can not do it.

改成一般疑问句，把情态动词can提前

Can you do it?

2.变否定有好几个情态动词分别是什么

情态动词有can (could), may (might), must, have to, shall (should, will (would), dare (dared), need (needed), ought to等 他们的否定形式分别是：can -----can't could----couldn't may ------may not might----might not must------mustn't have to------don't have to shall-------shan't should-------shouldn't will --------won't would-------wouldn't dare------darn't need------need't ought to------oughtn't to 情态动词的情态是什么意思？情态动词有四类： ①只做情态动词：must,can(could),may(might)…… ②可做情态动词又可做实义动词：need,dare,will ③具有情态动词特征：have(had,has) to,used to,ought to ④情态动词表猜测：一肯一否三不定（must一肯，can not一否，may,might,could，三不定。）

注：mustn't代表强烈禁止 must表示主观，have to表示客观。情态动词，be动词，助动词有什么区别 be动词，情态动词，助动词do/does的用法区别及练习1. 由连系am,is,are构成的句子：变一般疑问句时把am,is,are提到句子的前面，句尾用问号即可。

变否定句时直接在am,is,are后面加not即可。例如： 肯定句：He is a student.一般疑问句： Is he a student？否定句： He is not a student.画线提问： 对he提问： Who is a student？对 a student 提问： What is he? or What does he do?2. 由情态动词can, may, should等构成的句子： 变一般疑问句时把can,may，提到句子的前面，句尾用问号即可.变否定句时直接在can,may，后面加not即可. 例如：肯定句： She can swim.一般疑问句： Can she swim？否定句： She can not swim.画线提问： 对she提问： Who can swim？对swim提问： What can she do?3. 由行为动词构成的句子： 需要加助词do或does. 变一般疑问句时把do/does放在句子前面. 变否定句时把don't/doesn't放在动词的前面。

要注意观察动词的形式并对号入座。一般疑问句和否定句的动词三单式都要变回原型。

play-----do plays-----does 例如：肯定句： They play football after school. He plays football after school.一般疑问句： Do they play football after school? Does he play football after school？否定句： They don't (do not) play football after school. He doesn't' play football after school.画线提问： 对they/he提问： Who plays football after school？ 对play football提问： What do they do after school? What does he do after school？对after school提问： When do they play football? When does he play football?。