since 是什么意思

since 是什么意思

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。

since [sIns; sins] 《源自古英语“其后”的意思》 连接词 1 a. [常 ever ~,用于表继续之完成式主要子句后] 自从…以后,自…以来,从…起一直 He has been abroad (ever) ~ he parted from me. 自从他离开我后,他一直在海外 I've been doing this work (ever) ~ I retired. 自从退休后我一直在做这工作 b. 从做…时候起 (到现在 [那时] 的期间) The city has changed a lot ~ I have lived here. 自从我住在这里的时候起,这城市已改变了很多 He had not seen her ~ he (had) married. 自从他结婚之后他就一直没见过她 c. (~) 的构句] 自…后 (已过…年) It is [has been] two years ~ I left school. 自从我离校后已经过了两年 2 既然…,因为… S~ there's no more time, we must give it up. 既然不再有时间,我们必须放弃那件事 Let's do our best, ~ we can expect no help from others. 既然我们不能指望别人的帮助,我们就尽全力去做吧 介系词 1 a. [常 ever ~,常与表示继续之完成式连用] 自…以来 (一直) They have been very happy together ever ~ their marriage. 自从他们结婚以来,他们一直快乐地生活在一起 S~ then I had wondered where he lived. 从那时起,我一直在想他住在哪里 S~ when have you lived here?. 从什么时候起你就住在这里了? b. 从…以后 (时间[期间] (有多久) It's a long time ~ her death. 她去世后已经过了很久 She has changed a good deal ~ her sickness. 自从她生病后她已经改变了很多 c. (口语)从发明[发现]…的时代以来 He is the greatest novelist ~ Henry James. ( 口语)他是自亨利.詹姆斯以来最伟大的小说家 副词 (无比较级、最高级) 1 a. [常 ever ~] (那时) 以来 (一直) ,从那时以后 (直到现在) He went to America twenty years ago and has stayed there ever ~. 二十年前他去了美国,从此就一直留在那里 b. 从那时起 (到现在 [那时] 的这一段期间) ,其后 I have not seen him ~. 从那时候起我一直没见过他 2 [常 long ~] (从现在起) (几年) 前 long ~ 很久以前,好久以前 not long ~ 不久以前,未久 He has long ~ arrived. 他好久以前就到了; 他到了很久了

1.此后;从那时到现在，自从…… 2.既然;因为,由于

副词 ad. (常用于现在完成时或过去完成时) 介词 prep. 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。

since是什么意思？用法是什么？