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.

Rhaegar didn't KIDNAP my aunt,
or rape her.
Game of Thrones Season 7, Episode 7

Kidnap my sister-in-law? And take her
where? Where would she be safer than here?
Game of Thrones Season 4, Episode 1

So he could teach someone
how to KIDNAP princesses
The Big Bang Theory Season 5, Episode 12

Kidnap Bernadette from the opera
wearing a creepy mask...
The Big Bang Theory Season 4, Episode 4