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.

As long as the Boltons rule the North,
the North will SUFFER.
Game of Thrones Season 5, Episode 3

I didn't want you
to SUFFER here.
Westworld Season 2, Episode 9

that one in 100,000 people SUFFER.
Money Heist Season 1, Episode 10

...SUFFER from an external locus
of identity.
The Big Bang Theory Season 2, Episode 15

so do we SUFFER.
Game of Thrones Season 1, Episode 9