Hardly ______asleep when someone knocked at the door.
A,she had fallen    B,she fell     C,had she fallen   D,did she fall
C

試題分析:when引導的時間狀語從句,從句時一般過去時,主句要用過去完成時。又因為表示否定意義的詞Hardly位于句首,故主句用部分倒裝。
點評:英語中的時態(tài)主要由動詞的形式?jīng)Q定,因此在學習英語時態(tài)時,要注意分析動詞形式及具體語境,想象在那個特定的時間動作所發(fā)生的背景,這個動作是經(jīng)常性動作、一般性動作、進行性動作、完成性動作還是將要發(fā)生的動作。所謂部分倒裝就是把謂語動詞的一部分,即助動詞、情態(tài)動詞、系動詞移至主語的前面。因為前面有了助動詞或情態(tài)動詞,所以后邊的動詞要用原形。
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