Will someone please help me, I am a teaching trainee and I am stuck on this question.
What is the tense / form of 'used to have?' As in 'I used to have a dog'.
Is it the past of 'to use' + the infinitive of 'to have',
a sort of 'past progressive of to have'
or is it 'used to + have?'
Syntactically "used to' is the structural element of a compound verbal predicate. It can't be treated as a finite form of 'use'. I believe it is either a phasal or a modal unit.
Thank you all for your answers.