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 I would TRADE
in a heartbeat for all of this.
The Big Bang Theory Season 7, Episode 13

Knowledge is my TRADE, my lady.
Game of Thrones Season 1, Episode 3

what if I
propose a TRADE?
The Big Bang Theory Season 11, Episode 10

all the TRADE route talk,
and the boring senate hearings,
The Big Bang Theory Season 7, Episode 22

I wanted to TRADE him for Moat Cailin.
Game of Thrones Season 4, Episode 2