6.2 worth 的用法
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worth,worthy,worth-while都為adj. 意為"值得"。
1. worth: be worth + n.  當名詞為金錢時,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. 當名詞為抽象名詞時表示"……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.

典型例題
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,此句只適合詞組be worth-while to do sth.。因此選C。








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