初中英语时态知识点：一般现在时的句子转换
（1）变一般疑问句：当句子中有be动词或情态动词时，则把be动词或情态动词(can,could等)提到主语的前面，（口诀：一调二变三问号）;
（2）变否定句：在be动词或情态动词后面直接加not变成否定句. (be后not莫忘记)
例：①陈述句：She is my sister..
疑问句→ Is she your sister?Yes, I am./ No, I'm not.
否定句→ She is not my sister.
②陈述句：I can play soccer.
疑问句→ Can you play soccer?Yes,Ican./ No, I can't.
否定句→ I can not /can'tplay soccer.
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