一、当作“在……期间”讲,二者同义,但所表达的时间这一概念,during通常指“当时”,而in则是指“每时”。例如:
Where shall you be during the summer? 夏季你们将去哪儿?
In summer a lot of people go to seaside. 夏季有许多人到海滨去。
二、表达的是某一段时间,二者可以通用;是具体时间,则通常要使用in,不用during。例如:
He woke up three times during / in the night. 他夜里醒了三次。
They usually go on holiday in July, but last year they went in September. 他们通常在七月份休假,可是去年是在九月份休的假。
三、如果表达的是某一时间之后, 要用in,不用
during。例如:
They said the building would be completed in a year. 他们说那座楼将在一年后建成。
四、后面接的名词如果含有时间概念,二者可以通用;否则,通常只能使用during,而不用in。例如:
She had some amazing experiences during / in her childhood. 她在童年有过一些令人惊奇的经历。
He had some amazing experiences during his military service. 他在服役期间有过一些惊奇的经历。
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