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U97 for/since/ago, Part 12 介系詞
U97 介系詞for/since表時間（與ago比較）, 不用於現在完成式。 #,…
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- Steve left ten minutes ago.
史帝夫 10 分鐘前離開了。
--->從現在算起的 10 分鐘前
He graduated from Central University ten years ago.
他 10 年前從中央大學畢業。
--->從現在算起的 10 年前【97-01】
I climbed the mountain three months ago.
我三個月前去爬過山。
I saw him five minutes ago.
我五分鐘前見過他。
- We stayed in Venice for five days.
我們在威尼斯待了五天。
We have been working for hours.
我們已經工作好幾個小時了。
I haven't seen him for three years.
我已經三年沒見到他了。
He has waited for one hour.
他已經等了一個鐘頭了。
- I haven't talked to him since 2008.
從 2008 年之後，我就沒和他說過話了。
He has been waiting since 10:00.
他從 10 點等到現在。
It has been two years since I last saw him.
從我上次見到他到現在已經兩年了。