作业帮__for several weeks,the city needed food.A.As having flooded B.being flooded C.Having been flooded D.To flood
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__for several weeks,the city needed food.A.As having flooded B.being flooded C.Having been flooded D.To flood
__for several weeks,the city needed food.
A.As having flooded B.being flooded C.Having been flooded D.To flood
__for several weeks,the city needed food.A.As having flooded B.being flooded C.Having been flooded D.To flood
for several weeks 是完成时的标志,所以答案必为完成时,排除了B、D
但因为city 是被水掩的,所以要用被动.
因此答案是Having been flooded
整句：Having been flooded for several weeks,the city needed food.
已经水淹了几周,这城市需要食物了.
C. Having been flooded
过去分词的完成时态做原因状语，说明the city needed food 的原因。
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c
首先，中间有逗号不选A，后面句子是过去式，不选C，D完全不对，句中the city 是主语，只能是被淹，所以选B！
C
你好。答案是C
分词结构表“时间状语”，这个动作发生在needed以前，所以用“完成式”分词。
== AS the city had been flooded for weeks, it needed food.-------这是“时间状语从句”。