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。

I used to smoke, but I gave up a couple of years ago.

我以前抽烟，但几年前就戒掉了。

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

We’re used to the noise from the traffic now.

现在我们已经适应车辆往来的噪音了。

I’m used to getting up early.

我习惯早起。

be/get used to sth./doing sth

用 get 时侧重于动作，用 be 时侧重于状态。

例句：You quickly get used to using the brakes.

你很快就会习惯使用刹车的。

This is how we do things here. You'll soon get used to it

我们这里就是这么做事的。你很快就会习惯的。

The Republicans had better get used to the fact that in all probability, they are going to lose

共和党人最好习惯他们很有可能失败的事实。

I didn’t think I could ever get used to living in a big city after living in the country.

我觉得我在农村住了之后就无法适应大城市的生活了。

I soon got used to the tiresome job.

我很快习惯了这份烦人的工作。

She has got used to country life.

她已习惯了乡村生活。

比较：

I'm used to the weather in Scotland.

我习惯了苏格兰的天气。

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。

I'm used to drinking a glass of water after meal.我习惯于饭后喝一本水.

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。

This machine is used to clean the wall.这个机器是用来刷墙的.

This word is used to express a kind of animal.这个单词是用来表达一种动物的.