ããè±è¯ä¸ï¼æ²¡æ"have not to do"è¿ä¸ªç»æï¼ å 为æ æå¨è¯have toçå¦å®ç»æä¸è½å¨haveåå notã
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I have to stay at home because of the heavy rain. å 为大é¨æä¸å¾ä¸åå¨å®¶éã
ï¼å¤çç客è§å ç´ æ¯the heavy rainï¼
His mother is illï¼ he has to look after her. ä»å¦å¦ç äºï¼ä»å¿ é¡»ç §é¡¾å¥¹ã
ï¼å¤çç客è§å ç´ æ¯his mother is illï¼
ããäºã ä¸å ¶å®æ æå¨è¯ä¸åçæ¯ï¼have to æ人称ãæ°ä»¥ååç§æ¶æçååå½¢å¼ãä¾å¦ï¼
Tom has to get to school on time. (ç°åä¸å½¢å¼ï¼
Missing the last bus, they had to walk back home. (ä¸è¬è¿å»æ¶æï¼
We'll have to leave now for it is very late at night. (ä¸è¬å°æ¥æ¶æï¼
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We don't have to go to school on weekends. æ们å¨æ«ä¸å¿ ä¸å¦ã
They won't have to go to work this Friday afternoon.æ¬å¨äºä¸åï¼ä»ä»¬å°ä¸å¿ å»ä¸çã
Did you have to do your homework last night? æ¨å¤©æä¸ä½ å¿ é¡»åä½ä¸åï¼
What will you have to do if you make mistakes?å¦æä½ ç¯é误äºï¼ä½ å¾æä¹åï¼
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She doesn't have to go to school on weekends.
= She needn't go to school on weekends.
They won't have to go to work this Friday afternoon.
=They needn't go to work this Friday afternoon.