英语语法

Question

We must have our classroom______
(显得干净和明亮)
是looked clean and bright 还是 look clean and bright？
求解释

Answer 1

楼上说的have...done确实是存在的，但是不是此句话要表述的东西。
下面给出牛津高阶词典中的词条原文
【have】* CAUSING OR ALLOWING SOMETHING TO HAPPEN 使或让某事发生
用法【1】
[Cn.i no passive 不用於被动语态] order or arrange (that sb does sth) 命令或安排（某人做某事）:
I`ll have the gardener plant some trees. 我要让园丁种些树.
Have the driver bring the car round at 4. 让司机4点钟把汽车开来.
用法【2】
(used with a n + past participle 与名词+过去分词连用)
[cause sth to be done]使某事物予以处理 or [suffer the consequences of another person's action] 承受、 蒙受他人行为之后果
We're having our car repaired. 我们的汽车正在修理.
They have had their request refused. 他们的请求遭到拒绝.
用法【3】
[Cn.g no passive 不用於被动语态] cause sb to do sth 使某人做某事:
She had her audience listening attentively. 她使听众听得入神.
The film had us all sitting on the edges of our seats with excitement. 这部影片让我们大家激动不已.

考察动词look, look本来自己就有这样的意思：
To seem or appear to be:似乎，显得：看似或看起来：
所以教室看起来怎样本来就是主动动作，没有理由用被动。事实上说classroom is looked 这样说是大错特错的。
因为look不及物，怎能让classroom做look的宾语呢？

这道题考察的是上面的用法【1】
have sth. do=make sth. do
事实上还有：
have sth. adj. = make sth. adj.
have sth. done = make sth. done
have sth. doing = make sth. doing

再进一步我认为
说【We must have our classroom look/appear clean and bright.】
与【We must have our classroom looking clean and bright.】
与【We must have our classroom clean and bright.】
是一样的。

Answer 2

looked clean and bright
教室和看起来 之间是被动关系
have A do 使A去做...
have A done 使A被...

Answer 3

我猜是“look clean and bright”

Answer 4

look clean and bright 因为情态动词must后用动词原形

Answer 5

have sth done 所以应该用looked

Answer 6

答案应该是 look clean and bright
这是一个特殊用法，这里的look不能用被动语态，比如说“You look beautiful today."你今天看起来很漂亮，这里的look也不能用被动语态，两者是一样的。
退一步讲，如果可以用被动语态，也应该用”be looked clean and bright" 而不是“looked clean and bright”
希望你看的懂，望采纳。