使役动词have与动词连用

题目

使役动词have与动词连用
1.He is building a new house.
2.She will make a new dress.
3.I cut my hair yesterday.
4.We must cut this tree down

答案

he is having a new house buuilt.
she will have a new dress made.
I had my hair cut yesterday.
we must have this tree cut down.
结构have sth done