late

English as a Second Language English Vocabulary, Grammar and Idioms
1
  1. She married late(adv)
  2. She got married late(adv).
  3. She had a late(adj) marriage.
    Are all grammatically OK?
    Do they have the same meaning?
2

Yes and yes.

3

Mister Micawber,
“I haven’t been to the theater much late.”
Is this sentence OK?
If it is wrong, please correct and explain with grammatical reason.

4

No; an adverb is required:

I haven’t been to the theater much lately.

5

Mister Micawber,
When ‘late’ is considered both as adjective and adverb, we can use either ‘late’ or ‘lately’.
Why we must use ‘lately’ here?

6

‘Late’ as an adverb does not mean ‘recently’, as in your sentence. Check its meanings HERE.

7
  1. “I haven’t been to the theater much recently.”
  2. “I haven’t been to the theater recently.”
    Can I say as above?
8

Yes, those are fine.