[ sins ] 短语和例子 ★ 1. 主句中动词用现在完成式时， since 所引导的子句须用过去式： We have both changed since we parted. 分别以来彼此都变了。 2. 主句主语为 it, 动词用现在[过去]式时， since 引导的子从句须用过去[过去完成]时： It is two years since we parted. 我们分别以来有两年了。 It was two years since we had parted. 那时我们已经分别两年了。 2. 因为，所以，既是。 短语和例子 ★在表示原因的几个连词中，语气最强的词是 because, 其次是 since, 再其次是 as, for。 because 是直接说明问话 why 的‘理由’、‘原因’。 since 是站在‘时间’立场用‘既是…就…’的意义去说明事件关系中的自然结果的；表达这一理由的 since 通常放在句首，但在省略句中也可放在句中： S- force is no remedy, let us try conciliation. 武力既不中用，就想法和解吧。 That is a useless, since impossible, proposal. 既然不可能，那就是一个没用的提议。
…以来，以后，…之后，自从。 S- seeing you I have had good news. 见面以后得到(你的)不少好消息。 since midnight 午夜之后(到此时)。 since then 其后，从此一直。 adv. 1.以后，此后，以来。 ★由前置词惯用短语 since then, since that 略去 then (时)， that (事)而形成：I have not seen him since (＝since then). (那时)以后没见过他。 2.(距今几年)以前；(从那时候起几年)以前。 短语和例子 ★由 conj. 1. 义转变成的： It is two years since (we parted).＝We parted two years since (＝ago). 我们是在两年以前分别的。 It was two years since (we had parted).＝We had parted two years since (＝before). 我们是在那以前两年分别的。 ever since 从那时起，此后一直。 long since 好久以前，已久。 not long since 就在不久，未久。
Example Sentences:
1.
Since i am not crazy, i do not care . 既然我没有发疯，我就毫不在乎。
2.
He had changed, himself, since then . 从那时起，他自己也改变了很多。
3.
Since then he had drunk and stormed . 从那时起他就一直酗酒，使性子。
4.
He had cut me ever since my marriage . 自从我结婚，他就和我绝交了。
5.
Since then he has been drawing a pension . 从那时起他一直领退休金。
6.
She has thinned down a lot since last year . 自去年以来她瘦了好多。
7.
He has never been heard of since . 此后再也没有听到一点儿他的消息。
8.
It is three years to the day since we met . 我们整整三年没见面了。
9.
We have known each other since we were children . 我们从小就认识。
10.
I 've much to do since i got up . 起床之后我一直忙忙碌碌的，不曾得闲。
