meaning - Understanding "that" as in this statement


If I only say something as below without further more explanation, will a native speaker understand me?



He may be sexually dysfunctional, lately he can't do that his best. That's why I am here to help.



If I said it out loud and stressed "that", would you then ask me what is "that" ?




Comments

Popular posts from this blog

verbs - "Baby is creeping" vs. "baby is crawling" in AmE

commas - Does this sentence have too many subjunctives?

time - English notation for hour, minutes and seconds

grammatical number - Use of lone apostrophe for plural?

etymology - Origin of "s--t eating grin"

etymology - Where does the phrase "doctored" originate?

word choice - Which is the correct spelling: “fairy” or “faerie”?