VOA一分钟英语：怎样用 “used to” 描述往事？

你小时候经常做的事情是什么？当我们向他人提起往事时，常用到搭配 “used to”。你知道如何正确地使用这个搭配吗？
 
文字稿
Tom
Hello, everyone! Tom here from BBC Learning English in London.
I'm going to explain the expression 'used to'. 'Used to' describes repeated actions or habits in the past.
For example, I used to play football after school. 
And it can also describe states or things that happened over a long period of time. 
For example, I used to live in Japan.
We can also use 'used to' in the negative form. We just add 'did not' or 'didn't'. 
Using our first example, we could say, 'I didn't use to play football.'
But be careful, with negative and qustion forms, we don't include 'd' at the end of 'use'.
 
用法总结
（1） 'Used to' describes repeated actions or habits in the past.
“Used to” 可以描述过去时常做的事情或过去的习惯。
I used to play football after school.
 
（2） 'Used to' describes states or things that happened over a long period of time.
“Used to” 可以描述很长一段时间内的状态或发生的事情。
I used to live in Japan.
 
（3） We can also use 'used to' in the negative form. We just add 'did not' or 'didn't'.
“Used to” 的否定形式是 “did not use to” 或 “didn't use to”。
I didn't use to play football