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.

May I say, Penny, not a LOT of women
could look as hot as you do...
The Big Bang Theory Season 2, Episode 8

ALL: Space.
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title="- You know where there\'s a lot of nothing?
ALL: Space.
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- You know where there's a LOT of nothing?
ALL: Space.
The Big Bang Theory Season 6, Episode 5

It's worth a LOT.
Game of Thrones Season 3, Episode 10

Make more green, man. A LOT more.
Breaking Bad Season 3, Episode 9

And when my wingman is carrying
a Green Lantern lantern, I drink a LOT.
The Big Bang Theory Season 3, Episode 12