I work in a hotel and I was asking a coworker if we are permitted to drink the coffee in a certain location near the desk. I am trying to be formal with this request.
I asked "Are we allowed to take that coffee?"
In romanji "Sore Koohii o teru kyoka sa retamasu ka"
1) Am I allowed to combine verbs like this? Under what circumstance can I do this?
2) In order to be polite is it ok to add the masu to the last verb or do I have to add it to Teru as well?
3) How would I make this sentence casual?