what is the different between since and for

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/05/03 07:48:36

1.表时间：since 自从.,接时间点,句子用完成时.如; They have been working on the project since the the end of last year.
for+时间段,表示一个动作持续了多长时间,也用完成时.如：I have
learned English for ten years.
2.表原因：since 从属连词,“既然”,如：Since everybody is here ,let's begin our lesson.
for 并列连词,引导的并列句要放在后面.如:he didn't go to school,for he was ill.

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