had

• 1.  

  （） Had is the past tense and past participle of . (have)的过去式和过去分词
• 2.  

  AUX（助动词） Had is sometimes used instead of "if" to begin a clause which refers to a situation that might have happened but did not. For example, the clause "had he been elected" means the same as "if he had been elected." 代替(if)，引导一个表示虚拟假设条件的分句

  例：

  Had he succeeded, he would have acquired a monopoly.

  如果他那时成功了，他就会获得垄断地位。

• 3.  

  PHRASE（习语） If you have been had, someone has tricked you, for example by selling you something at too high a price. 受骗上当 [非正式]

  例：

  If your customer thinks he's been had, you have to make him happy.

  要是顾客觉得他受骗了，你得想法取悦他。

• 4.  

  PHRASE（习语） If you say that someone has had it, you mean they are in very serious trouble or have no hope of succeeding. 完蛋了 [非正式]

  例：

  Unless she loses some weight, she's had it.

  除非她减掉一些体重，否则她就完蛋了。

• 5.  

  PHRASE（习语） If you say that you have had it, you mean that you are very tired of something or very annoyed about it, and do not want to continue doing it or it to continue happening. 受够了 [非正式]

  例：

  I've had it. Let's call it a day.

  我受够了。我们今天就到这里吧。