Did you used to eat sweet when u were are a child和.

问题描述:

Did you used to eat sweet when u were are a child和.
Did you eat sweet when u were are a child 有什麼分别?
他已是过去式,那加used to 是不是要强调什麼?

used to do 是说过去常常,有一个频率上的限定.
而一般过去式只是表达过去的一个动作或一段时间的状态