形容词加"to do"有哪几种用法?

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形容词加"to do"有哪几种用法?
形容词加"to do"有哪几种用法?

形容词加"to do"有哪几种用法?
1 it+be+形容词(+of+宾语)+动词不定式结构主要与下列各类形容词连用:
  (a)表示性格的有:brave(勇敢的),careless(粗心的),cow-ardly(怯懦的),cruel(残酷的),generous(大方的),good(好的),nice(=kind善良的),mean(吝啬的,卑鄙的),rude(粗鲁的),selfish(自私的),wicked(邪恶的),wrong(不对的)等.与否定动词或疑问动词连用的有:fair*(公正的)/just* (正义的)/right*(对的).
  (b)表示智能的有:clever(聪明的),foolish(愚蠢的),idiotic*(呆痴的),intelligent(有才智的),sensible(有见识的),silly(傻的),stupid(愚蠢的).
  此外,absurd*(荒谬的),ludicrous*(荒唐的),ridiculous* (滑稽的)和unreasonable*(不合理的)有时也可这样使用.
  It was kind of you to help him.
  你帮助了他,真好心.
  It was stupid(of them) to leave their bicycles outside.
  (他们)真傻,居然把自行车放在外面了.
  (b)组形容词后的of+宾语结构可省略.有时该结构在(a)组形容词后也可省去,但good和nice除外.(后二者如果省略of+宾语则会改变good和nice的意义.参见E.)
  2代词+be+形容词+名词+动词不定式既可以与上面的形容词连用,又可以与下列形容词连用:astonishing*(令人惊讶的),curious*(奇怪的),extraordinary*(不寻常的),funny* (=strange*稀奇的),odd*(怪的),queer*(怪的),surpris-ing*(令人惊讶的)等.此外还有pointless(无意义的),useful(有用的)和useless(无用的)也可以这样使用.
  It was a sensible precaution to take.
  这样预防一下是明智的.
  That was a wicked thing to say.
  说那种话太恶劣了.
  这种评价式的话有时可用惊叹句来表达:
  What a funny way to park a car!
  这样停车好怪!
  What an odd time to choose!
  选的时间多怪!
  有时在一些表示不赞成的句子中,形容词可以省略:
  What a(silly) way to bring up a child!
  怎么用这种(愚蠢的)方法带孩子!
  What a time to choose!
  怎么选了这么个时间!
  that从句的例句如:
  It is strange/odd/surprising that he hasn’t answered.
  真是奇怪/古怪/令人惊讶,他怎么没回音.
  it+be+形容词+动词不定式结构中可以用下列词:advisable*(合意的),inadvisable*(不可取的),better*(较好的),best(最好的),desirable*(可取的),essential*(必要的),good(好的,可取的),important*(重要的),necessary*(必要的),un-necessary*(不必要的),vital*(非常重要的).也可以用only+fair*(公平的)/just*(合理的)/right*(对的).
  例句如:
  —Wouldn’t it be better to wait?
  —No,It’s essential to book in advance.
  —等一等不更好吗?
  —不行,必须预先订票.
  可在除good以外的形容词后或在just后加for+宾语,但在good后会改变其意思,见下文E:
  It won’t be necessary for him to report to the police.
  他没必要去报告警察.
  It is only fair for him to have a chance.
  给他一次机会才是公平合理的.
  inessential(非必要的)和unimportant(不重要的)通常不这么用,但可以说not essential.
  it+be+形容词(+for+宾语)+动词不定式结构中可以用下列形容词:convenient*(便利的),dangerous(危险的),diffi-cult(困难的),easy(容易的),hard*(艰难的),possible*(可能的),impossible(做不到的),safe(安全的),unsafe(不安全的).
  Would it be convenient(for you) to see Mr X now?
  (您)现在见X先生方便吗?
  It was dangerous(for women) to go out alone after dark.
  (妇女们)天黑以后单独出门是危险的.
  We found it almost impossible to buy petrol.
  我们发现几乎买不到汽油.(参见上面A.)
  上述形容词除possible之外,均可用于名词+be+形容词+动词不定式结构中:
  This cake is easy to make.
  这蛋糕很容易做.
  The instructions were hard to follow.
  这指示很难遵从.
  This car isn’t safe to drive.
  这辆车开起来不安全.

it is good to do
it is right to do
it is interesting to do
it is convenient to do
it is important to do
it is difficult/easy to do
很多啊 这里列举几个....

It is +形容词+to do sth 表示做什么很什么

表示 目的 愿望 倾向于 意图
如 volunteer tend decide fail manage intend desire pretend appear refuse seem swear