初一英语怎样句式变换

Question

详细点 像否定句，肯定句，疑问句，复数等等

Answer 1

1．肯定句变否定句

肯定句变否定句一般由否定词not来否定句中谓语。初一竞赛范围涉及be动词（is，am，are），情态动词can，部分实义动词（不包括第三人称单数）等。

（1）凡是含有be（is，am，are），can的句子，变否定句时，一律在is， am，are，can后加not，即：am not，is not，are not，cannot（cannot一般不分开写）。除am not不可以用缩写式外，其它均可用缩写式，即：isn't， aren't，can't。如：

This is a car．→This is not（isn't）a car．

Those are birds．→Those are not（aren't）birds．

I am a student．→I am not a student．

We are Young Pioneers．→We are not（aren't）Young Pioneers．

She is my friend．→She is not（isn't）my friend．

There is a clock on the table．→There is not（isn't）a clock on the table．

I can see the boat on the river．→I can't see the boat on the river．

（2）祈使句的否定式一般是在祈使句前加don't。如：

Do it like that！→Don't do it like that！

Put on that coat．→Don't put on that coat．

（3）实义动词（不含第三人称单数）的否定式，是在实义动词前加don't构成。如：

I know it．→I don't know it．

I think so．→I don't think so．

I want to put it on．→I don't want to put it on．

2．陈述句变一般疑问句

陈述句变一般疑问句时，凡含有is，am，are，can的句子，将这些词前移至句首（第一个字母大写），句尾的“．”改为“？”即可。如：

Her skirt is red．→Is her skirt red？

I am in this classroom．→Am I in this classroom？

They are in Class One．→Are they in Class One？

These are football socks．→Are these football socks？

She can swim．→Can she swim ？

There are some flowers behind the house．→Are there any flowers behind the house？

注意：some一般用于肯定句，any用于否定句和疑问句。含实义动词（不含第三人称单数）的句子变一般疑问句时，是在句首加do。如：

I want a go．→Do you want a go？

I have a sharpener．→Do you have a sharpener？

3．就一般疑问句回答问题

对一般疑问句的回答，肯定回答用yes，否定回答用no。yes后接“主语＋is（am，are，can，do）”；no后接“主语＋isn't（am not，aren't， can't，don't）”。在答语中，原名词主语改为代词he，she，they等；指示代词主语this，that改为it；these，those改为they。如：

—Are you a teacher？—Yes，I am．（No，I am not．）

—Is M ary in our class？—Yes，she is．（No，she isn't．）

—Are these books yours？—Yes，they are．（No，they aren't．）

—Is there a man under the tree？—Yes，there is．（No，there isn't．）

—Can you look after my sister？—Yes，I can．（No，Ican't．）

4．单数句变复数句

单数句变复数句涉及名词和动词的人称和数，人称代词、物主代词、指示代词的人称和数的问题。单数句变为复数句时，上述各类词都要做相应变化，其它词类不变。如：

This is my pencil-box．→These are our pencil-boxes．

That book is mine．→Those books are ours．

He is her teacher．→They are their teachers．

语法
1. 一般过去时
定义：过去发生的动作或状态
标志词：in the past … two days ago
yesterday last night
句型转换：
肯定句：主+动词过去式+其它
In the past, people liked travelling by bus
过去人们喜欢乘公交车旅行。
否定句：主+didn’t+动词原形+其它
He didn’t play football last year.他去年不玩足球。
一般疑问句：Did+主+动词原形+其它
Did he play football yesterday？他昨天玩足球了吗？
2. There be 句型的过去时及将来时
过去时：There was/were There was a tree in front of the house last year.
将来时：There will be There will be more trees in the park in 5 years’ time.

Answer 2

字太多了不好打！建议你还是去问你英语老师吧！