【摘要】除了课堂上的学习外，平时的积累与练习也是学生提高成绩的重要途径，本文为大家提供了阿坝中考英语词汇辨析：since/ for，希望对大家的学习有一定帮助。

since/ for

(1) since用于完成时态，既能用作介词，也能用作连词，后常接时间点，意思是“自从”。

He has been a worker since he came into this city.

自从他来到这个城市，他就是工人了。

I have never seen him since we last met in Shanghai .

自从我们上次在上海见过之后，我再也没见过他。

since作连词，还有“既然”的意思。

Since you are interested in it, just do it. 既然你对它感兴趣，那就做吧。

You can have fun now since you’ve finished your work.

既然你已经做完了功课，就开心玩会儿吧。

(2) for用于完成时，用作介词，后常接一段时间，意思是“经过…”。

I have learned English for five years.我已经学了五年英语了。

They have waited for you for 30 minutes.他们已经等了你三十分钟了。

for也可以用作连词，但意思是“因为”。

They missed the flight for they were late.他们由于完到了而误了航班。

He fell ill for many reasons.他由于多种原因病倒了。

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