①He came to England three years ago and has lived here ever since.
他三年前来到英国,从那以后便一直住在这里。
②I haven't seen her since ten years ago.
自十年前至今,我没见过她。
③We have completed half of the work so far.
到目前为止,我们完成了一半的工作。
④He hasn't written to me recently.
他最近没给我写信。
⑤The couple have been working very hard for/in the past (last) ten years.在最近的十年里这对夫妇一直努力工作。
拓展:It is/was/has been+时间段+since...自从……已经多久了。
It will be/was+时间段+before...再有多长时间才……
在 “It is/was+时间段+since...”句型中,若 since从句中的动词为延续性动词,句子意思要发生变化。
It is three years since he joined the army. 他参军3年了。
It is three years since he smoked.他戒烟3年了(不吸烟)。
[即境活用1] (2009·天津南开中学)How long do you suppose it is ______ he arrived there?
A.whenB.before
C.after
D.since
解析:考查 “It is+一段时间+since...”,表示“自从……到现在多长时间”。
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