牛津实用英语语法:120 had better+不带to的不定式

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  这里had是指不真实的过去;其含义是现在或将来时:

  I had/I’d better ring him at once/tomorrow.

  我最好还是现在/明天就给他打电话。

  其否定式是在better之后加上not:

  You had better not miss the last bus.

  你最好不要误了最后一班公共汽车。(误了这趟车是不明智的或者我劝你/提醒你不要误了这趟车。)

  had通常在代词后用缩略形式,在口语中有时轻读甚至弱读到将近听不到的地步。

  had better通常不用于普通的疑问式,但有时用于否定疑问式,作为一种劝告句式:

  Hadn’t you better ask him first?

  你先问一下他不更好吗?相当于:

  Wouldn’t it be a good thing to ask him first?

  是不是先问一下他比较好?

  you had better是一种很有用的劝告句式:

  You had better fly.

  你最好是乘飞机走。(我劝你乘飞机走。)

  在间接引语中,had better与第一、第三人称连用时保持不变,与第二人称连用时可以保持不变,或者转述为advise+宾语+不定式:

  He said,‘I had better hurry.’

  他说:“我最好快一点。”相当于:

  He said(that)he’d better hurry.

  他说他最好快一点。

  He said,‘Ann had better hurry.’

  他说:“安最好快一点。”相当于:

  He said(that)Ann had better hurry.

  他说安最好快一点。

  He said,‘You’d better hurry.

  他说:“你最好快一点。”相当于:

  He said(that) I’d better hurry.

  他说我最好快一点。

  He advised me to hurry.

  他劝我快一点。