英语四六级考试中，单独考察语法的题型不多，但是语法知识点却贯穿整张试卷，小伙伴们，趁着寒假，赶紧来打好基础吧！
worth的用法
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.worthB.worthyC.worth-whileD.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。
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