�。�1）變一般疑問(wèn)句：當(dāng)句子中有be動(dòng)詞或情態(tài)動(dòng)詞時(shí)，則把be動(dòng)詞或情態(tài)動(dòng)詞(can,could等)提到主語(yǔ)的前面，

　�。�口訣：一調(diào)二變?nèi)龁?wèn)號(hào)）;

　　（2）變否定句：在be動(dòng)詞或情態(tài)動(dòng)詞后面直接加not變成否定句. (be后not莫忘記)

　　例：①陳述句：She is my sister..

　　疑問(wèn)句→ Is she your sister?  Yes, I am./ No, I'm not.

　　否定句→ She is not my sister.

　�、陉愂鼍洌篒 can play soccer.

　　疑問(wèn)句→ Can you play soccer?  Yes,Ican./ No, I can't.

　　否定句→ I can not /can't  play soccer.
 

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