Question

1．-Have you known Mr．Li for a long time？
-Yes，since he _________ the club．（　�。�

• A． has joined
• B． joins
• C． will join
• D． joined

Answer 1

分析 ---你認(rèn)識(shí)李先生很久了？
---是的，自從他加入俱樂(lè)部．

解答 答案：D．結(jié)合句意是說(shuō)自從他加入俱樂(lè)部就認(rèn)識(shí)了，加入join動(dòng)作發(fā)生在過(guò)去，故用一般過(guò)去時(shí)，故答案是D．

點(diǎn)評(píng) since的四種用法1）since+過(guò)去一個(gè)時(shí)間點(diǎn)（如具體的年、月、日期、鐘點(diǎn)、1980，last month，half past six）．例如：
I have been here since 1989.1989起，我一直在這兒．
2）since+一段時(shí)間+ago．例如：
I have been here since five months ago．我在這兒，已經(jīng)有五個(gè)月了．
3）since+從句．例如：
Great changes have taken place since you left．你走后，變化可大了．
Great changes have taken place since we were here．我們走后，變化可大了．
4）It is+一段時(shí)間+since從句．例如：
It is two years since I became a postgraduate student．我考上研究生有兩年了．