很長(zhǎng)時(shí)間以后他才意識(shí)到自己的錯(cuò)誤.
It is/was +時(shí)間段＋before．．．．多長(zhǎng)時(shí)間以后,才...
it is／was not＋時(shí)間段＋before．．．多長(zhǎng)時(shí)間以后,就.
時(shí)間狀語(yǔ)
It was quite a long time before he realized his mistake.
It was quite a long time before he realized his mistake.
before he realized his mistake是什么從句
before he realized his mistake是什么從句
英語(yǔ)人氣：539 ℃時(shí)間：2020-04-12 17:32:19
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