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 know, you're not being
very SYMPATHETIC.
The Big Bang Theory Season 9, Episode 15

and SYMPATHETIC and,
most of all, completely believable.
Breaking Bad Season 4, Episode 4

...pagans brought evergreen boughs in their
homes as an act of SYMPATHETIC magic...
The Big Bang Theory Season 2, Episode 11

He was SYMPATHETIC. His exact words
were, "Got your back, Jack.
The Big Bang Theory Season 4, Episode 5

I've come to pour them out to
the SYMPATHETIC ear of the local barkeep.
The Big Bang Theory Season 4, Episode 7