him,with后面要用宾格形式
families,前面说了是3个,所以用复数
Their,answer是答案的意思,前面应该用物主代词
Are they your daughters?,一般疑问句,动词（系动词、助动词）提前
Our teachers don't have a good time every friday.,在动词前加助动词和not
What does Lily often do with her cousin?,特殊疑问句,疑问词前置,加助动词,原句动词用do代替
How many books are there in the box?,特殊疑问句,疑问词前置
There are not many people in the park.
What does Tom always do with his friend Mike?,特殊疑问句,疑问词前置,加助动词,原句动词用do代替
What do the children often have for their dinner?