Не на все ответила.
1.i don't know
2.do they not
3.she thinks,he drives
4.he understands,he eats,he always forgets.
5.who is that man,who is standing,don't you recognize,it is.
6.i have,i am having
7.does your family leave,we always go,we all like,mother stays,father returns.
8.where are tom & nick,they are having.
9.what are you doing,we are listening.
10.do you want,i go.