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.

No, Leonard's taking me
to a PHYSICS lecture...
The Big Bang Theory Season 6, Episode 9

...in which the participants answer
PHYSICS questions in remedial Spanish.
The Big Bang Theory Season 6, Episode 4

"What do you say to a graduate
of the UC Berkeley Physics Department?"
The Big Bang Theory Season 8, Episode 19

Homespun stories,
knowledge of PHYSICS
The Big Bang Theory Season 5, Episode 5

written about him
in Physics Today?
The Big Bang Theory Season 7, Episode 6