used to and past simple

My dad ... live on a boat

• USE TO

• USED TO

You ... in my class

• didnt use to

• didnt used to

we can used to to talk about a state, habit or action we did in the ...

• past

• present

the negative form is

• didn t used to

• didn t use to

in questions the form is did+subject +...

• used to

• use to

we use ... + infinitive to make negatives in the past simple

• didn t

• did

we use ... + subject + infinitive to make questions.

• did

• do

... finish their homework last night?

• did they

• they did

when ... you go to sleep last saturday ?

• did

• do

where ... stand at the concert?

• he did

• did he