| 1.及物动词需要接宾语才能使其意义完整,而不及物动词后无须接宾语,只有及物动词可用于被动语态,如: The door was opened by a girl.
 He was lying.
   2.有些动词既可以作及物动词,也可作不及物动词:a.意义没差别,如:
 The policeman stopped the car.
 My watch has stopped since this 
              morning.
    b.意义有差别或稍有差别,如:People grow rice in the south. 
              (种植)
 Rice grows well in the south. (生长)
 Workers run machines with electricity.(开动)
 He runs fast.(跑)
   3.有少部分及物动词用作不及物动词时,具有被动含义,这时主语往往是物而不是人,如:Toys sell very quickly.
   4.有些动词如 have, lack, resemble, suit等要求有宾语,但不能用于被动语态,如:This coat suits you very much.
 
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