時態(tài)不同：
don't know:現(xiàn)在時,描述的現(xiàn)在的一種狀態(tài),在說的時候仍然不知道
hadn't known:過去完成時,在過去的某一點不知道但是之后知道了
haven't konwn:現(xiàn)在完成時,在說的之前并不知道,或許剛聽到了什么內(nèi)容就知道了
didn't know,had't know和haven 't know用法有什么區(qū)別
didn't know,had't know和haven 't know用法有什么區(qū)別
英語人氣：278 ℃時間：2019-12-09 01:25:53
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