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.

you switched stickers
two, NINE, 32, and 51.
The Big Bang Theory Season 12, Episode 19

Oh, yes! Nine!
The Big Bang Theory Season 7, Episode 10

Well, I started the
list when I was NINE.
The Big Bang Theory Season 5, Episode 5

Mmm... Except the creature in the crib
is a level NINE poop monster.
The Big Bang Theory Season 10, Episode 13

I've spent NINE months helping Bernadette
get ready for this baby.
The Big Bang Theory Season 10, Episode 11