作业帮since 不是等于because
来源：学生作业帮 编辑：拍题作业网作业帮 分类：英语作业 时间：2024/05/23 01:12:20
since 不是等于because
since:副词 ad.(常用于现在完成时或过去完成时)
1.此后;从那时到现在
She left school three years ago and has worked as a nurse ever since.
她三年前毕业,从那时起便一直当护士.
2.之前,以前
介词 prep.
1.(常用于现在完成时或过去完成时)自...以来,从...至今
I haven't heard from him since last year.
我自去年以来未曾收到过他的信.
连接词 conj.
1.(常用于现在完成时或过去完成时)自...以来,从...至今
It's been ten years since they married.
他们结婚到现在已经十年了.
She has been living a hard life since her husband died.
她自从丈夫死后,一直过着艰苦的生活.
2.既然;因为,由于
He must have taken the book since it isn't here.
他一定是把书拿走了,因为书已不在这里了.
Since it is so hot,let's go swimming.
既然天气这么热,我们去游泳吧.
because意为“因为”,指直接原因,语气最强,常表示必然的因果关系,引导的原因状语从句是全句意思的重心,它引导的从句一般放在主句的后面,回答以why引起的特殊疑问句,只能用because,如：Tom didn’t go to school because he was ill.（汤姆没去上学,他病了.）
since意为“由于,既然”,所引导的从句表示的是已知为事实的理由和一种间接或附带的原因,语气比 because弱,但比as强,其从句一般位于主句之前,如：Since I have no money,I can’t buy any food.（由于我没钱,所以我不能买食物.）
1.此后;从那时到现在
She left school three years ago and has worked as a nurse ever since.
她三年前毕业,从那时起便一直当护士.
2.之前,以前
介词 prep.
1.(常用于现在完成时或过去完成时)自...以来,从...至今
I haven't heard from him since last year.
我自去年以来未曾收到过他的信.
连接词 conj.
1.(常用于现在完成时或过去完成时)自...以来,从...至今
It's been ten years since they married.
他们结婚到现在已经十年了.
She has been living a hard life since her husband died.
她自从丈夫死后,一直过着艰苦的生活.
2.既然;因为,由于
He must have taken the book since it isn't here.
他一定是把书拿走了,因为书已不在这里了.
Since it is so hot,let's go swimming.
既然天气这么热,我们去游泳吧.
because意为“因为”,指直接原因,语气最强,常表示必然的因果关系,引导的原因状语从句是全句意思的重心,它引导的从句一般放在主句的后面,回答以why引起的特殊疑问句,只能用because,如：Tom didn’t go to school because he was ill.（汤姆没去上学,他病了.）
since意为“由于,既然”,所引导的从句表示的是已知为事实的理由和一种间接或附带的原因,语气比 because弱,但比as强,其从句一般位于主句之前,如：Since I have no money,I can’t buy any food.（由于我没钱,所以我不能买食物.）