1.I have some homework to do 对
2.The work must be finished on time
3.The teacher warns us not to go swimming in the river
4.These books are not sold
5.The work has not been finished谢谢，可是规定了要用to be done 的形式啊1.There issome homework to be done.2.The work mustbe finished on time 3.We are warnednot to go swimming in the river 4.These books can't not be sold up in a day.5.The work has not been finished