各位同学，根据英语“四位一体”中考复习教学路子，本期我们将进行句型转换、翻译填空、短文改错三种题型解题技巧的归纳指导，请大家做好准备，先请看——
一、当肯定句的谓语动词是be或由be构成时，改为否定句，应在be后面加not。如：
There were some students in the classroom yesterday．
→There weren't any students in the classroom yesterday．（注：原句中的some变否定句时改为any）
He is going to see his uncle this afternoon．
→He isn't going to see his uncle this afternoon．
二、当肯定句的谓语动词只是行为动词时，改为否定句，要用“助动词do（does，did）＋not＋动词原形”。如：
He studies English well．
→He doesn't study English well．
We moved to France in 1987．
→We didn't move to France in 1987．
I want to do my homework with you．
→I don't want to do my homework with you．
三、当肯定句的谓语是由“情态动词can，may，must等＋动词原形”构成或由“助动词will，have，had等＋动词原形（或动词的现在分词、过去分词）”构成，变否定句，要用“情态动词／助动词＋not＋动词原形（或动词的现在分词、过去分词）”构成。如：
Tom can speak Chinese well．
→Tom can't speak Chinese well．
They will go to see a football match this afternoon．
→They won't go to see a football match this afternoon．
She is watching TV now．
→She isn't watching TV now．
I have finished reading that book．
→I haven't finished reading that book．
四、当肯定句的谓语是have时，分两种情况：
1.当have作“有”讲时，变否定句的方法有：
a．由have ＋not ＋其它；
b．由have ＋no ＋其它；
c．由 don't（doesn't，didn't）＋have＋其它。如：
You have some oranges．
→You have not any oranges．
→You have no oranges．
→You don't have any oranges．
2当have既不当作“有”讲，也不是助动词，而是行为动词时，改为否定句，要用“助动词do， does，did等＋not ＋have”构成。如：
He had a meeting yesterday afternoon．
→He didn't have a meeting yesterday afternoon．
五、当肯定句中含有情态动词have（has）to时，改为否定句，有两种构成法，一种借助do，一种不借助do（仅限于现在时和过去一般时），多数人用第一种形式。如：
They had to worry about money．
→They didn't have to worry about money．
→They hadn't to worry about money．
六、当肯定句中含有too，also时，改为否定句，须将too， also改为either。如：
He is there，too．→He isn't there，either．
That shirt also fits me．→That shirt doesn't fit me，either．
七、当肯定句中含有always时，改为否定句，须将always改为never。如：
Tom always asks the same questions ．
→Tom never asks the same questions．
八、当肯定句中含有already时，改为否定句，须将already改为 yet。如：
He has already seen the film．→He hasn't seen the film yet．
九、当肯定句中含有nearly时，改为否定句，须将nearly改为 hardly。如：
They nearly know it．→ They hardly know it．
