I'd like to share this thought: sometimes English translations of Japanese sentences make the language seem so much more complicated than it actually is.
Great Example:
"Mr. Hill can speak Chinese".
Simple? Of course, and so it is in Japanese as well:
(romaji form)
"Hiru-san wa Chuukokugo o hanasu koto ga dekimasu."
If I personally were to tranlsate this back into English my thinking would be:
"Mr. Hiru Chinese speak can."
With the understanding of the particle placements and that "koto" is acknowledging the concept (thing) of "speaking" here, the translation would be simple to me.
However!
The book that teaches this same sentence translates it back into English is this way:
"As for Mr. Hill, speaking Chinese is possible".
Huh? :? Soooo... since it's 'possible' for Mr. Hill, does it mean he definitley can, or not?
Tell me if you think such a translation is neccessary? ☝