We must have an engineer see the workers build the house.这句话表达对吗?怎么划分成分?

We must have an engineer see the workers build the house. 表达完全正确.
1.句子的基本结构：
We must have an engineer(我们得让一位工程师...）
We主语,must have谓语,an engineer宾语
2.但是宾语不够完整,再加补语.
have sb do sth要某人干某事.如：
I will have him know who i am.(我将让他知道我是什么人）
此句中see the workers便是补语.
3.但是补语的宾语又不够完整,再加补语.
see sb. do sth 看见某人做了某事（强调结果）.
see sb. doing sth 看见某人在做某事（强调过程）如：
I saw a man enter your room(我看见一个人进了你的房间.)
i saw a couple of guys fighting over there.(我看见几个人在打架)
此句中build the house 便是补语.
4.翻译： 我们得让一位工程师看着工人将房子盖好.