Sugar,when___ with water,dissolves quickly.A.mixed B.mixing C.mix D.is答案应该选A.为什么不能选B?AB的区别是什么?说明原因,

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Sugar,when___withwater,dissolvesquickly.A.mixedB.mixingC.mixD.is答案应该选A.为什么不能选B?AB的区别是什么?说明原因,Sugar,w

Sugar,when___ with water,dissolves quickly.A.mixed B.mixing C.mix D.is答案应该选A.为什么不能选B?AB的区别是什么?说明原因,
Sugar,when___ with water,dissolves quickly.
A.mixed B.mixing C.mix D.is
答案应该选A.为什么不能选B?AB的区别是什么?说明原因,

Sugar,when___ with water,dissolves quickly.A.mixed B.mixing C.mix D.is答案应该选A.为什么不能选B?AB的区别是什么?说明原因,
用ed分词形式表示被动,ing表示主动(这两种都是分词形式)
因为糖和水是被混在一起的,所以用ed表被动

a,a是被动。sugar 被加水

区别是主语和动词时被动的关系,这分句是省略了it is。

A 相当于,when it is mixed with water 如果选B就成了,我很it is mixing with water. 糖是被与水混合,是需要人来做这个混合的动作的,不是糖自己混合的,所以用被动语态。

请你分析一下下面几个句子,然后就明白了
I mixed sugar with water.
Sugar is mixed with water.
When sugar is mixed with water,it dissolves quickly.
Sugar dissolves quickly when it is mixed with water.
S...

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请你分析一下下面几个句子,然后就明白了
I mixed sugar with water.
Sugar is mixed with water.
When sugar is mixed with water,it dissolves quickly.
Sugar dissolves quickly when it is mixed with water.
Sugar,when it is mixed with water, dissolves quickly.
这是做题的思路和基本方法,熟练以后就有语感了,直接闪出答案。
注:我给的第五句是错误的,只是为了帮助你理解。应该去掉it is,我也说不出为什么,但有它的话显得很累赘。

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