during和for的区别和用法

during，for 介词for引导时间状语时，很易和during混淆不清。

它们的区别如下：

（1）during用在已知的时期、节日或表示时间观念的名词之前，其后通常接the、this、that、these、those、my、your、his„„等词。

during the last four days（the spring of 1995） during the winter（war，economic crisis of 1929） during that time（the course of the play） during my holidays（summer vacation）

during her absence（interview） during our stay in Japan（their visit here）

而for则用以表示“有限的”或“无限的”时间概念，通常其后接冠词、数词，复数名词或副词ever。

for the first time（a time，a while） for a couple of weeks（days） for two months（weeks）

for many years（generations） for years（months） for ever（ages）

（2）during的涵义是“当„„之际”，它既可指某个动作在某个时期里连续不断地进行，也可以指某个动作在这段时期里的某个时间发生。

He was sick for a week and during that week he was placed in an infirmary．

他病了一个星期，在这个星期里，他住在护养院。

It snowed all day but stopped snowing during that night． 下了一整天雪，到晚上才停了。

而for的涵义是指某个动作在某个时期里处于连续不断的状态。

They worked for the whole day． 他们干了一整天。

在某些场合下，for含有“预先安排”或“为了某一目的”之含义。表示此意味时，大多和come、go、stay、lend、rent、hire等词连用。

I went to Europe for the holidays． 我到欧洲度假去了。

They will stay with us for the New Year． 他们将和我们在一起，共度新年。

We're off for our honeymoon． 我们要去度蜜月。

May I borrow your camera for Christmas？ 我可否借你的照相机在圣诞节时使用

After graduating in 1665, Newton planned to study for a master's degree, but the university was closed due to an outbreak of the plague. He returned to his home village for 18 months, during which time he did most of the thinking that led to his later work on gravitation and optics.

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during which time...... 是定语从句, which 是关系代词, 在从句中作定语修饰time, (which time )一起作介词during的宾语, 介词短语during which time在定语从句中作时间状语。