The best way to learn proper English is to read news report, and watch news on TV. Watching TV shows is a great way to learn casual English, slang words, understand culture reference and humor. If you have already watched these shows then you may recall the words used in the following dialogs.

just INTRODUCE you to the guy?
The Big Bang Theory Season 5, Episode 21

What stimulus
should we INTRODUCE it to first?
The Big Bang Theory Season 10, Episode 8

We just came by to
INTRODUCE ourselves.
The Big Bang Theory Season 12, Episode 4

- Sheldon, are you gonna INTRODUCE us?
- Oh, all right. This is Missy.
The Big Bang Theory Season 1, Episode 15

I'm gonna INTRODUCE your friend
to a world of hurt.
The Big Bang Theory Season 2, Episode 7