I walked slowly through the market,where people（ ）all kinds of fruits and vegetables.I studied the prices carefully and bought what I needed.A.sell B.were selling C.had sold D.have sold 此题正确答案是选B,此题强调的是 “我正在走

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I walked slowly through the market,where people（ ）all kinds of fruits and vegetables.I studied the prices carefully and bought what I needed.A.sell B.were selling C.had sold D.have sold 此题正确答案是选B,此题强调的是 “我正在走
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I walked slowly through the market,where people（ ）all kinds of fruits and vegetables.I studied the prices carefully and bought what I needed.A.sell B.were selling C.had sold D.have sold 此题正确答案是选B,此题强调的是 “我正在走
I walked slowly through the market,where people（ ）all kinds of fruits and vegetables.I studied the prices carefully and bought what I needed.
A.sell B.were selling C.had sold D.have sold
此题正确答案是选B,此题强调的是 “我正在走着,看到了人们正在卖这些东西” 但是我不明白这句话用的为什么是过去进行时,而不是正在进行时?
那为什么不可以用”过去完成时“或”一般过去时“？

I walked slowly through the market,where people（ ）all kinds of fruits and vegetables.I studied the prices carefully and bought what I needed.A.sell B.were selling C.had sold D.have sold 此题正确答案是选B,此题强调的是 “我正在走
时态要前后呼应,主句用的过去式,所以不能用现在进行时态.
强调当时人们在卖各种蔬菜和水果

‘我正在街上走’是过去时，看到时也是在过去，所以前后一致要用过去进行时

此题有两个标志“when”,“walked”
即walked表明了是过去发生，而“when”说明是“当……时候正在……”故用进行时，远B

因为是当我在市场闲逛时的那个时刻，所以是过去进行时，而不是现在进行时。再如：
Mom was cooking dinner when I got home.---我到家时，妈妈在做晚饭。
到家已经是过去时了，所以那个时刻就是过去进行时了。

希望对你有帮助那为什么不可以用”过去完成时“或”一般过去时“？...

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因为是当我在市场闲逛时的那个时刻，所以是过去进行时，而不是现在进行时。再如：
Mom was cooking dinner when I got home.---我到家时，妈妈在做晚饭。
到家已经是过去时了，所以那个时刻就是过去进行时了。

希望对你有帮助

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前后时态要保持一致，前面是过去时“walked ”，所以后面是过去时

现在进行时讲的是现在正在发生的或者是带有感情色彩时（如表达不满），而过去进行时讲的是过去正在发生的。
从题中“walked“即可看出讲的是过去，而我路过那个市场时，那里“正在”卖水果蔬菜，所以用过去进行时。怎么看出来 那里“正在”卖水果蔬菜的？” “正在”是在答案选项里看出来的，在题中看不出来“正在”呀？
那为什么不可以用“过去完成时”或“一般过去时”？因为题中有说“I studi...

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现在进行时讲的是现在正在发生的或者是带有感情色彩时（如表达不满），而过去进行时讲的是过去正在发生的。
从题中“walked“即可看出讲的是过去，而我路过那个市场时，那里“正在”卖水果蔬菜，所以用过去进行时。

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