They should of course keep that in mind, but it's not that "should" should always be followed by a verb directly. The problem is that "of" in this context is a mishearing/spelling of "have", so they should in this case have written it like that instead.

[–] Huschke 5 points 1 year ago (1 children)

I love that you used "should of" in a valid sentence.

[–] [email protected] 3 points 1 year ago

Except that it would be "they should, of course,".

[–] jadero 1 points 1 year ago

I would argue that "should of" is just a naive written rendition of the spoken contraction "should've". They are homophones, so it's a completely understandable error among those without the relevant education or background. I know only English and was in Grade 9 at a different school before someone corrected me.