Hi, I'm desperate for help here. There is this exercise in a first certificate book where pupils have to underline the incorrect verb form in this sentence: "Only poor women who couldn't afford servants didn't use to have to / wouldn't have to /didn't have to wear corsets" I've got the answer key at the back of the book and the incorrect option seems to be the first one. It does sound funny to me but I really can't see why the first one is incorrect but the second isn't, when both of them are used to express habit in the past. I'd really appreciate it if I could get some help here.
Top answer
html ]HERE[/url], Monica.
— Mister Micawber
html ]HERE[/url], Monica.
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