Question

_____ you _____ to go to the park when they were children?

_____ you _____ to go to the park when they were children?

[ ]

A. Did, useB. Did, usedC. Do, used D. Do, use

Answer 1

A. Did, use，放心采用。

追问

为什么不是B

追答

I used to do sth 我过去常(做)....used是过去时啊，转为问句，自然是Did you use to...，换个词，I went to the shop，换为问句，你就不能说Did you went to the shop？而是did you go to the shop？ 另外，很多人（包括英美人士）在不正式的情况下也会说Did you used to... 但这是种很不规范的表达，考试，写作中尽量避免。 希望对你有所帮助。

Answer 2

选B。
1、used to do sth. 表示“过去常常做某事” ；
2、后面的when they were children说明提问者问的是过去的事情， 应该用过去式表示 所以疑问助词应该用Did。

Answer 3

选A

use to do 过去常常做某事 ,过去，应该用used to do ，一般疑问句，助动词提前，did used

谢谢，希望帮到你

Answer 4

A. Did, use