-How long did you wait me?-___he came back at 10.A.until B.after C.before 为什么选A?

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-How long did you wait me?-___he came back at 10.A.until B.after C.before 为什么选A?

-How long did you wait me?-___he came back at 10.A.until B.after C.before 为什么选A?
-How long did you wait me?
-___he came back at 10.
A.until B.after C.before
为什么选A?

-How long did you wait me?-___he came back at 10.A.until B.after C.before 为什么选A?
因为这里问的是一段时间,如果选B‘在……之后’,C‘在……之前’都是时间点,不用HOW LONG 问,而是用WHEN 问,故只有A对‘直到他十点回来’

你等我到什么时候？--直到他10点钟回来。
这样一翻译，就明白了吧

前一句是持续性的概念，b和c指的是一个确定的时间，要用一段时间选a

和at有关，在一个时间点

你等我到什么时候？
直到他10点钟回来

until表示：直到。。。的意思，是瞬间性词语，后面可跟时间点，after和before后面则不能跟时间点，而wait也是瞬间性词语，所以用until
若问题中有延续性动词，则用not。。until来回答！~

问 等了多久。回答应该 是 具体的时长或者截止时间

直到呀。。。别的不通

用until指的是从过去某一时间起直到“他10点回来”为止一直再等，指时间长短。

呃，我觉得该选B

until用在肯定句,谓语动词通常是延续性动词,如stand, stay, talk, wait等,表示主句动作终止的时间。如果用在否定句,谓语动词通常是瞬间性动词,如start, leave, arrive, finish, stop等,强调主句动作开始的时间。

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