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worth，worthy，worth-while都为adj. 意为值得. 1. worth： be worth + n. 当名词为金钱时，表示 值得 be worth doing sth. 某事值得被做 The question is not worth discussing again and again. 2. worthy：be worthy of +n. 当名词为抽象名词时表示值得 be worthy to be done 某事值得被做 The question is not worthy to be discussed againand again. 3. worth-while： be worth-while to do sth 值得做某事 worth while： It is worth while doing sth It is worth while sb to do sth. 典型例题 It is not ____ to discuss the question again and again. A.worth B.worthy C.worth-while D.worth while 答案C. 由worth的用法可知，此句只适合词组be worth-while to do sth因此选C. | 
