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There is apple on the desk.è¿å¿æä¸ä¸ªè¹æå¨æ¡ä¸ã
I. It is + adj. + to do somethingç»æ
ããå¥ä¸itæ¯å½¢å¼ä¸»è¯ï¼çæ£ä¸»è¯æ¯å¨è¯ä¸å®å¼to do somethingãå æ¤ä¹å¯ä»¥è¡¨è¾¾ä¸ºto do something + is +adj.ã
ããe.g. It is amazing to drive past fields which seem to go on forever or whole hills covered with neat rows of grapevinesã
ããæ¬å¥å½¢å¼ä¸»è¯ä¸ºitãçæ£ä¸»è¯to driveâ¦grapevines移å°äºå¥ååé¨ï¼ä½¿å¥ååå¾å¹³ç¨³ï¼ä¸è´ä¸»è¯å¤ªé¿ãå¦ææçæ£ä¸»è¯æ¾å¨åé¢ï¼é£ä¹æ´ä¸ªå¥åå°±æ¾å¾å¤´éèè½»ãå æ¤ï¼å°±ç¨itä½ä¸ºå
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ãã1. It is + adj. + for somebody to do something
ããe.g. It was very difficult for them to fly because men have not got wings.
ããæ¤å¥çæ£ç主è¯æ¯å¨è¯ä¸å®å¤åç»æfor them to flyãå
¶ä¸themæ¯to flyçé»è¾ä¸»è¯ã
ãã2. It is + adj. + of somebody to do something
ããe.g. It is sensible_____ you to bring an umbrella in such weather.
ããA. in B. for
ããC. with D. of
ããçæ¡ä¸ºDãè¿ésensibleè·é»è¾ä¸»è¯youçå
³ç³»æ¯è¡¨è¾¾äººçç¹ç¹ãæ§æ ¼ãæ¬è´¨çãåæ¤ç±»å½¢å®¹è¯è¿ækind, foolish, clever, wise, friendlyçã
II. It is +åè¯+ to do somethingç»æ
ããe.g. It is great fun to see the pandas walking in the zoo.
III.å¦å¤, itä½å
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ãã1. it +åç©å¨è¯+宾è¯+ä¸å®å¼
ããe.g. It cost me 100 dollars to repair the car.
ããIt takes me two hours to finish my homework every day.
ããIt gave me great pleasure to watch them.
ãã2. it + be +åè¯/形容è¯+ doing
ããe.g. It is no use studying for an exam at the last minute .
ããIt is a waste of time talking to him.
ããIt is pleasant sitting here
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