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 should LEND him your copy
of Bombay Badonkadonks.
The Big Bang Theory Season 4, Episode 3

I'll LEND you my username.
It's Wealthy Big Penis.
The Big Bang Theory Season 2, Episode 4

Don't LEND your new brother-in-law money.
The Big Bang Theory Season 10, Episode 1

He refuses to pay fines when
he's overdue with books I LEND him...
The Big Bang Theory Season 4, Episode 7

I'm here to LEND my wisdom and my support.
Game of Thrones Season 6, Episode 4