be used to do, be used to doing 和used to do的区别

1）used to过去经常，以前常常(现在不做了) 
We used to go there every year. 我每年都去那儿。 
He is not what he used to be. 他已不是旧日的他了。 

2）be used to doing习惯于做某事 
He’s quite used to working hard 他颇习惯于艰苦工作。 
He is used to living in the country now.他现在习惯了住在农村。

3）be used to do sth.被用来做… 
Wood is used to make paper.木材被用来造纸。
This knife can be used to cut things.这把刀能够被用于切东西。