working hours 的動詞是用單數還是複數?

http://forum.thefreedictionary.com/postst37266_work-hours--working-hours.aspx



答: 複數, 如:

"My working hours are from 7am to 7pm."
"I work twelve hours a day."
"It comes to twelve work-hours a day."
"I am in the building for thirteen hours, but am only paid for twelve working hours a day."
"I am in the building for thirteen hours, but am only paid for twelve work-hours a day."

再參:

http://english.stackexchange.com/questions/168129/singular-verb-or-plural-verb-for-working-hours?noredirect=1#comment349835_168129