ten years ago是一個時間點(diǎn),也就是十年前.而加上before,那就是10年前還要之前,光從意義上來講就行,你說對不?
before指的是某個時間點(diǎn)以前的時間,而since指的是某個時間點(diǎn)以后的時間.
這里很明顯是說從十年前到現(xiàn)在,所以用since.
希望我的解釋你能明白.
How many years have you worked here?____ten years ago.
How many years have you worked here?____ten years ago.
為什么不能用Before而要用since?
為什么不能用Before而要用since?
英語人氣：777 ℃時間：2019-11-15 19:23:06
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