1.It is time for you to go to work.
2.It is time for you to get off work.
3.How long is it from now to your working hours?
4.How long is it from now to your closing time?
5.I have 20 minutes left for work /I have 20 minutes left for off-duty.
6.I always want to go to Shanghai for fun,but have not money anf time,so I do not go.