since后通常接一般過去時。例如，He’s put on a lot of weight since he gave up smoking.

since前后時態(tài)

一、since通常通常搭配的時態(tài)

當(dāng)since表示“自從”時，不管它是用作介詞、連詞還是副詞，它通常都要與現(xiàn)在完成時（since前）連用。如：

I’ve worn glasses since my childhood. 我從小就戴眼鏡。

The works have been closed since January. 一月份以來這些廠就關(guān)閉了。

He’s put on a lot of weight since he gave up smoking. 他戒煙后體重增加了許多。

Nothing has happened since. 從那以后未發(fā)生什么事。

She moved to London last May and has since got a job on a newspaper. 她去年五月到倫敦 此后一直在報社工作。

有時連用現(xiàn)在完成進(jìn)行時。如：

He has been working since noon. 他從中午就開始工作了。

二、since搭配時態(tài)的特殊情況

雖然since通常要與現(xiàn)在完成時連用，但在以下情況，它也可以連用除完成時態(tài)以外的其他時態(tài)：

1. 當(dāng)主句表示“多長時間”時，動詞可用一般現(xiàn)在時（當(dāng)然也可用現(xiàn)在完成時）。如：

It’s a long time since I met you last. 好久不見了。

It’s just a week since we arrived here. 我們到這里才一個星期。

It’s a long time since I met you last. 從上次見到你，已有很長時間了。

以上各句的it is也可換成 it has been，不過在口語或非正式文體中，用一般現(xiàn)在時的情形比較普遍。

2. 當(dāng)主句謂語動詞為seem等連系動詞時。如：

It seems like years since we last met. 我們似乎幾年未見面了。

It seems like years since I last saw you. 從上次見到你以來好像已經(jīng)有許多年了。

3. 當(dāng)主句和從句表示情況“變化”時。如：

She doesn’t come round to see us so much since her marriage. 自從結(jié)了婚，她不怎么過來看我們了。（原來經(jīng)常來，結(jié)婚后就不怎么來了）

since雙語例句

Since then，I have the appetite.

從那時起，我有了食欲。

Since I know him.

自我認(rèn)識他以來。

Or maybe not，since they only keep it for one month.

或者，也許不會，因?yàn)樗麄冎槐３炙鼮橐粋€月。