The adverb 'that' is used to emphasize how big, bad, much etc something is.
He is not that handsome.
It is OK, but what if I used a noun such as 'man' in a sentence with an adjective? Are the sentences I have written below are grammatically OK?
1- He is not that handsome man.
2- He is not that a handsome man.
'He is not that handsome a man.'