From a lesson named (WOULD as a past tense), I quote the following:
[You cannot use WOULD for a past state or things that lasted a long time. "I USED TO smoke" that's correct, but you cannot say "I WOULD smoke"]. (end of quotation)
My question is: (smoke) is an action verb (not stative) refers to a past habit; why it can't be used with "WOULD" as stated above in the example given.
Thanks in advance.