高三英语复习——动名词

2007-10-31 10:00:51   来源:转载   评论:0 点击:
    a walking tractor=a tractor which a driver can operate while he or she is walking behind it 手扶拖拉机
2. worth 的用法
worth, worthy, worthwhile都是形容词,意为"值得"。
1) worth: be worth + n.  当名词为金钱时,表示"…… 值得……"
常见的有It ’s worth while to do./ It ’s worth(someone’s)while doing
   be worth doing sth. "……某事值得被做"
  The question is not worth discussing again and again. 这问题不值得反复讨论。
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 again and again.
3) worthwhile:be worthwhile to do sth  "值得做某事"
  It is worthwhile to ask him to join the club.值得邀请他加入俱乐部。
典型例题
It is not ____ to discuss the question again and again.
A. worth  B. worthy C. worthwhile D. worth while
答案C. 由worth的用法可知,此句只适合词组be worthwhile to do sth.。选C。
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