What's the difference between a truck and a lorry? In my view lorries are much bigger.
I think, for example, Ford F 150 is a truck, but not a lorry, right?
In the UK, do you call it a "pick-up lorry"? Those are the trucks that have open backs, like the Ford F150.
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.
I am also beginning to feel that truck in general is entering BrE vocabulary at the expense of lorry.
But that's just an opinion; others may disagree.