The structure for using "be used to" is subject + be verb + used to + object. "Be used to" expresses something that is familiar or easy for the subject. It can be used to talk about past habits or something that was previously true but no longer is. "Be used to" can be used in any tense by conjugating the verb "be" appropriately.

1. Structure of Be used to
The structure is:
subject + be + used to + object
subject main not used to object
verb
be
+ I am used to horses.
- He is not used to horses.
We aren't used to horses.
? Are you used to horses?

2. If the object involves a verb, we use the -ing form:
I am not used to being lied to.
He is used to working late.
We aren't used to taking the bus.
Are you used to cooking?

3. Use of Be used to
The be used to expression is for talking about something that is
familiar to us or easy for us. For example:
I am used to driving on the left.
It means that it is not a problem for me to drive on the left of the
road. I am Japanese. In Japan, people drive on the left. Now I am
living in the USA where people drive on the right. Of course, I drive
on the right in the USA, but when I go to Japan it is easy for me to
drive on the left because "I am used to it".
Look at these examples.
.
I am used to working hard.
He isn't used to living in New York.
Are you used to eating quickly?

4. Tenses
We can use be used to in any tense.
We just conjugate the verb be in the
tense that we need. Look at these
examples:
•When we lived in Bangkok,
we were used to hot weather.
•You will soon be used to living alone.

5. Used to
We use 'used to' for something that happened regularly in
the past but no longer happens.
•I used to smoke a packet a day but I stopped two years ago.
•Ben used to travel a lot in his job but now, since his promotion,
he doesn't.
•I used to drive to work but now I take the bus.
We also use it for something that was true but no longer is.
•There used to be a cinema in the town but now there isn't.
•She used to have really long hair but she's had it all cut off.
•I didn't use to like him but now I do.