We used to smoke.是什么时态的?怎么改为否定句?对smoke划线怎么提问?(词组是used to:过去常常）求这_英语解答

We used to smoke.是什么时态的?怎么改为否定句?对smoke划线怎么提问?(词组是used to:过去常常）
求这三题、急~~~
不懂的、装懂的就别说了

人气：486 ℃　时间：2019-11-02 02:06:32

解答

Used you to smoke?
Did you use to smoke?
We didn't use to smoke.
We usedn't to smoke.
What used you to do?
What did you use to do?