Chinese phrase
工作时间是〜到〜吗？ gōng zuò shí jiān shì 〜 dào 〜 ma
Meaning
Are the working hours from ___ to ___?
When to use it
It asks whether working hours run between two stated times. It is a polite way to ask about a work schedule.
Example dialogue
请问，工作时间是上午9点到下午6点吗？ qǐng wèn gōng zuò shí jiān shì shàng wǔ 9 diǎn dào xià wǔ 6 diǎn ma
Excuse me, are the working hours from 9 a.m. to 6 p.m.?
是的，平时是上午9点到下午6点。 shì de píng shí shì shàng wǔ 9 diǎn dào xià wǔ 6 diǎn
Yes, usually they are from 9 a.m. to 6 p.m.