A:	明天你有空吗?	mı́ngtiān nı̌ yǒukòng ma?	Do you have free time tomorrow?
B:	我要上课。	wǒ yào shàngkè.	I have to go to class.
A:	几点下课?	jı̌ diǎn xiàkè?	What time do you finish class?
B:	下午四点。	xiàwǔ sı̀ diǎn.	Four in the afternoon.