一般现在时一般疑问句和否定句的变法

一般现在时一般疑问句和否定句的变法

一、先将句子分成三类：1）含有am, is, are 的句子。

2）含有行为动词的句子，（如like，have，play，eat，run，need）

3）含有情态动词的句子，如can。

(1) 如果是第一类，即含有am, is, are 的句子。只将把am, is, are 调到句首。I am 和We are 要变成are you，some变成any，my变成your，句末用问号。否定句只在be后加not。如am---am not； is ---isn’t； are----aren’t。如：

① I am a boy. （否定句）----- I am not a boy.

(变成一般疑问句)

-----Are you a boy? Yes, I am. No, I’m not.

② She is my mother.( 变成一般疑问句)

-----Is she your mother? Yes, she is. No, she isn’t.

③ This is a book.( 变成一般疑问句)

------Is this a book? Yes, it is. No, it isn’t.

④ These are strawberries.( 变成一般疑问句)

----Are these strawberries? Yes, they are. No, they aren’t.

⑤ There is some chicken on the table.( 变成一般疑问句)

-----Is there any chicken on the table? Yes, there is. No, there isn’t.

(2)如果是第二类，即含有行为动词的句子（如like，have，play，eat，run，need等）时，要分两步看主语。

①I / We / You / They 时，要借助于助动词do的帮助来变成一般疑问句。即句型为：

Do + 主语 + 动词原形 + 其他？否定句只在动词原形前加don’t。例如：①

②③④

I have some tomatoes in my backpack.(否定句)I don’t have any tomatoes in my backpack.

( 变成一般疑问句)-----Do you have any tomatoes in your backpack? Yes, I do. No, I don’t.

We play sports every day.（否定句）---We don’t play sports every day. ( 变成一般疑问句)----Do you play sports every day? Yes, we do. No, we don’t.

②He / She / It 时，要借助于助动词does的帮助来变成一般疑问句。即句型为：

Does + 主语 + 动词原形 + 其他？否定句只在动词前加doesn’t，然后将单三还原成原形。

She watches TV every evening. (否定句)---She doesn’t watch TV every evening.

( 变成一般疑问句)----Does she watch TV every evening?

Yes, she does. No, she doesn’t.

注意：如果是其他名词的话，在简略回答中要用人称代词来替代，但替代都在第三人称中，即 he, she, it, they四个中。如：

my mother ---she your brother ---- he a book ----it five photos-----they this/that-------it these/those------they my family name-----it

Tom----he

Mary--------she Amy’s sister -----she some friends------they

(3) 如果是第三类情态动词，如can 时，一般疑问句只将can提到句首，否定

句将can 变成can’t。同时注意一变二，二变一，三不变，some变any。(情态动词不受人称的限制)

I can play basketball. ( 变成一般疑问句)----

Can you play basketball? Yes, I can. No, I can’t.

I can play basketball.(否定句)-----I can’t play basketball.