Have had to意思

"have had to" 是英語中一個常用的時態結構,用於表達過去到現在一直存在的某種情況或責任。這個結構通常用來描述某人不得不做某事,或者被迫做某事的情況。

例如:

  1. I have had to work extra hours to meet the deadline. (我不得不加班以趕上截止日期。)
  2. She has had to take care of her sick mother. (她不得不照顧她生病的母親。)
  3. They have had to cancel the party due to the bad weather. (由於糟糕的天氣,他們不得不取消了聚會。)

在這個結構中,"have" 是助動詞,"had" 是過去分詞,"to" 是動詞不定式的標誌,後面跟的是動詞原形。這個結構通常用來強調動作的持續性或者必要性,表明這個動作是從過去某個時間開始,一直持續到現在,或者是對現在有影響的。