when在引導(dǎo)時間狀語從句時結(jié)構(gòu)有be doing when did
而在此句中,強調(diào)玻璃磚塊先落下,然后他們才意識到地震來臨,玻璃磚塊落下這個動作在發(fā)現(xiàn)地震來臨前發(fā)生.所以用現(xiàn)在完成時,而were falling是二者一同發(fā)生,不符愿意
The glass and bricks____(fall)down when they realized it was an earthquake.動詞填空 答案是have fallen 為什么不是were falling
The glass and bricks____(fall)down when they realized it was an earthquake.動詞填空 答案是have fallen 為什么不是were falling
英語人氣：741 ℃時間：2020-03-22 15:12:06
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