had not 的缩写形式:hadn't
什么是 “had not” 的缩写?
“had not” 的标准缩写形式是 hadn't。它用于构成过去完成时(Past Perfect Tense)的否定句。
基本结构
肯定句:Subject + had + past participle
否定句:Subject + hadn't + past participle
例句
- She
hadn't finishedher homework when I called. - They
hadn't seenthe movie before last night. - I realized I
hadn't lockedthe door.
常见错误
注意不要将 hadn't 与 didn't have 混淆。前者用于过去完成时,后者用于一般过去时。
- ✅ I
hadn't eatenbreakfast.(过去完成时) - ✅ I
didn't havebreakfast.(一般过去时)