【worth】worth相关用法?

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【答案】 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.