238　during和through

① during表示“在……期间”，强调在某段时间内发生了什么。

I often went to see her during my stay there. 我住在那里时常去看她。

These animals never go out of the hole during the whole winter. 在整个冬天，这些动物从不出洞。

提示

要注意的是，during不可与表示具体长度的时间词连用，这时要用介词for。for+时间名词表示所用的总的时间，for短语常用于完成时中，也可用于过去时。

He has lived here during a long time.

He has lived here for a long time.

他住在这里已经很久了。

Their discussion lasted for three hours. 他们的讨论持续了三个小时。（for可省去）

② through的本意是“通过，穿过”，表示“自始至终”。

He walked through the town. 他步行穿过小城。

She slept all through the day. 她睡了整整一天。

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