Can obfuscate be used in a sentence?

'Whom' is used when you are referring to the object of the verb. 'Who' is used when you are referring to the subject of the verb.'Who is there?''Who broke that vase?''For whom is that parcel...

(Get to means find a path or colloquially, a method to accomplish something.)"I could not find a way to get to the parade.""With luck, I will get to retire next year."

I have thought about this when conversing with people who consider English a second language. This awkward construction might be considered an idiom. It is commonly used but is not properly...

"At" and "in" can be used in any prepositional phrase, such as "The piano can be found "in" the music room" or "the sonata was played "at" the end of the recital.

Ok, well you can use the word 'who's' as a question, e.g. 'Who's that watching tv?' That's all i can think of so far, i think its mainly, you use the word 'who's' as a question who's is the...