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.

which he would eat, BEFRIEND, or battle.
The Big Bang Theory Season 9, Episode 9

Well, I'd BEFRIEND SpongeBob, but he's not
real, so I can't do that, can I?
The Big Bang Theory Season 9, Episode 9

So I'd eat the eel, fight the shrimp,
and BEFRIEND the puffer fish
The Big Bang Theory Season 9, Episode 9

I shall BEFRIEND him.
The Big Bang Theory Season 2, Episode 13

Um, I'll BEFRIEND the seal
because he's trainable,
The Big Bang Theory Season 9, Episode 9