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在大学英语六级考试中，几乎没有单独考察语法的题目，但并不代表语法知识不重要，语法知识贯穿整个六级试卷。下面考试吧英语四六级考试网为大家整理了英语六级语法知识，希望可以为大家带来帮助，一起来学习吧。
英语六级语法知识：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.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。
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