We in this pond when we were young,but now it _ fish.A.

来源：学生作业帮编辑：拍题作业网作业帮分类：英语作业时间：2024/04/29 09:08:39

We __ in this pond when we were young,but now it ___ fish.A.are used to swim,used to keep
B.are used to swimming,is used to keep
C.used to swim,is used for keeping
D.used to swim,used to keep

C答案是肯定的了,下面我给你解释一下为什么.
要说一下use 这个词的用法.
1：sb used to do sth：某人过去常常做某事,表明现在不这样做了,给你举个例子：
I used to go to school by bus,but I've got a car now.我过去坐公交车上学,但是现在我有车了.
2：be used to：这里要注意,这个后面可以接doing,也可以用do,如果接doing,那这个句子就翻译成“习惯了做某事”例句：I am used to staying up late at night.“我习惯熬夜了”.注意,在这个句子里,to是介词,因此后面要用doing.
如果接do,那就翻译为“被用来做某事的”例句：“this medication is used to get you better"翻译为“这种药是用来让你康复的”,在这里,to不是介词,而是不定式符号,所以后面接动词原形do.
3：be used for：翻译为“被用来做...”后面可以接名词,代词,动名词doing
例句如上句：this medication is used for your recovery“ 这种药是为你康复而用的.
this medication is used for you：这药是用在你身上的.
this medication is used for geting you better,这个句子=this medication is used to get you better,因为for是介词,所以后面接doing.
4：be used by：被...使用的.this medication is used by doctors：医生们都使用这类药物.
be used as：被作为.而使用.sugar can’t be used as salt：糖不能当作盐来用.
希望有助于你.

We __ in this pond when we were young,but now it ___ fish.A. when we were young Mother _us fairy tales when we were young ,but now she _tell When we were young.we dream this day.Wrestlemania!) 3.We used to play__________ when we were young． A.in the san there was a pond and there ______(be) fish in it.were ；鱼不是不可 How __ it ___?(happen) We were boating on the lake when she When we said goodbye, I thought it was forever. but we ___ a We were sitting in the living room when it ___(begin) to rai there was a pond with fish in it. We _______(share)a room when we were in Rngland. we had a w____ time when we were in Thailand