If you don't know a person that good, although you have had a word with them or greet

[tufguy]

If you don't know a person that good, although you have had a word with them or greeted them several times then you should not invite that person to your home. You cannot believe every second person in today's era.

Please check my sentences.

[emsr2d2]

If you don't know someone well, even if you've spoken to them a few times, you shouldn't invite them to your home. You can't trust half the people in the world these days!

That's my neater version.

[GoesStation]

Review the definition of good. Is it an adverb?

[Charlie Bernstein]

Hi, Tufguy! We don't say "every second person." We say "every other person."

[probus]

"That good" is obviously wrong grammatically but is sometimes heard from a certain group of speakers of AmE. If you use it you are branding yourself as a member of that group. But you could never in a million years pull off the rest of that dialect. So don't use it. Say what your teachers taught you to say: "that well."