"Used to" versus "Would"

[WonderWoman]

I'd like to know a good way to explain to my students the differences in usage between used to and would; sometimes it's clear, but when it isn't very clear, I have problems in trying to explain it Thanks everybody!

[colloquium]

Past actions and events use would or used to.

I would/used to surf all summer when I lived in California.

But used to refers to past states.

I used to love you. Not, I would love you.

Used to also refers to past regular habits.

I used to eat junk food. Not, I would eat junk food.

In seeking clarification of these explanations I consulted Michael Swan's Practical English Usage. P.634

I am not a teacher.

[Raymott]

I'd like to know a good way to explain to my students the differences in usage between used to and would; sometimes it's clear, but when it isn't very clear, I have problems in trying to explain it Thanks everybody!

Can you give some examples of when it isn't clear to you. There might be a pattern you're missing.