I think he is a very responsible person > He used to be a very responsible person" > I don't know why he isn't a responsible person anymore.."
They always go to art galleries- They used to go to art galleries> I don't know why they don't go to art galleries anymore"
I think the prices are very low- > The prices used to be very low- I don't know why the prices aren't low anymore"
Customers give very good tips - Customers used to give very good tips -> I don't know why the costumers don't give tips anymore<
He goes for a walk every morning - He used to go for a walk every morning- I don't know why he doesn't go for a walk in the morning anymore."
She studies a lot - She used to study a lot - I don't know why she doesn't study any more"
He works for a multinational company- > He used to work for a multinational company> I ddon't know why he doesn't work for a multionational company anymore"
They go out all the time- They used to go out all the time - I don't know why they don't go out anymore"
He plays for the college team> He used to play for the college team- I don't know why he doesn't play for the college team any more"