Hi,

1. As a rule, what comes after a preposition must or should be a noun or any noun equivalent?

2. I saw a lesson content writing that is written like this without the regard for English article rules, is it OK? Is it a norm to employ this type of writing style for lesson content section writing?

Lesson Content: Specify location and tell about location.

I think you are asking whether an article is needed after the preposition 'about' in this example. No, because this is just a title, and articles are often omitted from titles.

Best wishes, Clive

Hi again,

My questions were two-fold: one was whether a grammatical element that comes after a preposition should (must??) be a noun or noun equivalent like  a noun clause or not ; and the other was whether the following writing which I found under 'Functions' heading can do without English articles, of which you said 'yes' to (did I write this correctly? of which you said 'yes' to ).

I think a typical Syllabus section of a learner's book might be written like this:

Unit:9

Title: Where's SUE?

Functions: Specify location and tell about location

Here, as you can see, under the heading of 'Functions', the wording 'Specify location and tell about location' occurs, not under the apparent heading of 'Title'. Do you still stand by your position? Yes, it's still just a form of 'heading', and such things are often written in point form.

Best wishes, Clive