澳洲aeas考试:need "不必做"和"本不该做"
目前,南京、上海咨询和报名AEAS考试培训人数的不断增多,越来越多的国内学生通过报名AEAS考试去澳洲留学。但是AEAS考试对国内的学生来说,难度还是相当大的。为了应对广大学子的需求,澳大利亚中学入学考试网老师会给大家提供AEAS培训和AEAS真题模拟,希望大家持续关注澳大利亚中学入学考试网。今天小编给大家带来的是need "不必做"和"本不该做"。
need "不必做"和"本不该做"
didn't need to do表示: 过去不必做某事, 事实上也没做。.
needn't have done表示: 过去不必做某事, 但事实上做了。
John went to the station with the car to meet Mary, so she didn't need to walk back home. 约翰开车去车站接玛丽,所以她不必步行回家了。
John went to the station with the car to meet Mary, so she needn't have walked back home. 约翰开车去车站接玛丽,所以她本不必步行回家了。 (Mary步行回家,没有遇上John的车。)
典型例题
There was plenty of time. She ___.
A. mustn't have hurried B. couldn't have hurriedC. must not hurry D. needn't have hurried
答案D。needn't have done. 意为"本不必",即已经做了某事,而时实际上不必要。
Mustn't have done 用法不正确,对过去发生的事情进行否定性推断应为couldn't have done, "不可能已经"。 must not do 不可以(用于一般现在时)。
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