2.—Bird flu(禽流感)is still very serious in some countries.
2.—Bird flu(禽流感)is still very serious in some countries.
—Yes.Something must __________(do) to stop it from spreading.
done .但我不明白为什么要用be done,这是什么时态?为什么不能用be doing
—Yes.Something must __________(do) to stop it from spreading.
done .但我不明白为什么要用be done,这是什么时态?为什么不能用be doing
其他人气:815 ℃时间:2020-04-15 14:03:23
优质解答
这个是被动语态.直译就是:“什么事情一定要被做”.被动语态肯定要用过去分词.do的过去分词是done.
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