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.

How do you know her?
Game of Thrones Season 3, Episode 2

How long is it gonna be
before he gets to me?
The Big Bang Theory Season 12, Episode 10

How--? How long was I out?
Breaking Bad Season 5, Episode 10

Do you know
HOW much l make a year?
Breaking Bad Season 4, Episode 6

HOW much one person
likes another.
The Big Bang Theory Season 5, Episode 17