used to 和uesd to be有什么区别?

问题描述:

used to 和uesd to be有什么区别?
我不是很清楚它们的区别?谢谢大家了/!

i used to do it,如,i used to warter flowers
i used to be,如,i used to be a fool,but now i am clever,
used to 是干!
used to be后面接一种状态,有个be了,当然是个状态