not need to和 needn't区别是什么?
动词 “need” 的意思是 “需要,必须”。它的否定形式有两种:“not need to” 和 “needn't”。它们有区别吗?现在时态和过去时态下的这两个否定形式在用法上一样吗? 用法总结 1 在现在时态下,“(do) not need to” 和 “needn't” 表达的意思通常是一样的,即 “不需要,用不着”。“Needn't” 比 “not need to” 稍微更正式一点。 You don't need to worry about the exam, you've studied lots. You needn't worry about the exam, you've studied lots. I don't need to go to work tomorrow as it's a holiday. I needn't go to work tomorrow as it's a holiday. 2 在过去时态下,“(did) not need to” 常用来表达我们之前没有做某事,因为 “不需要”。 He didn't need to worry about the exam. He had already passed the course. I didn't need to go to work today, so I stayed in bed. 3 在过去时态下,“needn't + have + 动词过去分词” 常用来表达我们之前做了某事,但其实 “本不必” 做。 He needn't have worried about the exam. It was really easy. I needn't have gone to work today. I didn't realise it was a holiday. What a mistake! |