can the water be taken back again ---------------(一旦泼出去了）（on

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can the water be taken back again ---------------(一旦泼出去了）（once)

once it had been poured out 句式有点复杂呢这个句子我用了过去完成时如果没有学过就不要选这个了：）
）
再问：为什么要用过去完成时？
再答：呃。。。因为我感觉应该用过去完成时态呵：）如果不用完成时态至少这应该是发生在 be taken back 以前啊~ 那就用过去是 once it was poured out. 这是我的个人理）大家的回答各有各的道理：）自由选择哈~ 但是如果把这个句子看作是一种描述例如覆水难收那就与时态无关了就用 once it is poured out.啦：）看你怎么理解咯^^ 祝你快乐：）

can the water be taken back again ---------------(一旦泼出去了）（on water can be found on the earth and in the you can come on sunday ,（） the maneger will be back you can feel a little drop of water on the back of you hand. Water can be turned _____by rain.(away,down,off,back) The light is on .Mr Green ____ back home.A.can't B.must be C On no account ____ be taken out of the library. The flood water was be kept back by barriers We can use the water we use for washing rice again to water The make-up will be taken from the mill treated water line这句 I 期待 my friend can be back on Sunday she's leaveing on a jetplane and won't be back again