一道英语选择题“I can not see the blackboard very well ” “perhaps you need ——”A to examine your eyesB to have examined your eyesC having your eyes examinedD to have your eyes examined答案是的D我觉得C也对不是need doing需

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一道英语选择题“I can not see the blackboard very well ” “perhaps you need ——”
A to examine your eyes
B to have examined your eyes
C having your eyes examined
D to have your eyes examined
答案是的D我觉得C也对
不是need doing需要被做吗

正如你所说的 need doing 是需要被做,但是它的主语多是物
【答案】D
【解析】Perhaps you need to have your eyes examined 中主语是 you 你,所以用 need to do
另外,后面有个词组时 have sth done 意思是：使某事被做,也表示被动
不知道这样说,你是否明白?
【另附】 need 的相关用法：
①need to do 需要做某事（主语多是人）
I need to water the flowers.
②need doing = need to be done （主语多是物）
The flowers need watering.= The flowers need to be watered.
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need to do
你背错了
D

need有两层词义：
一层是做情态动词，情态动词后面需跟动词原形。
二层是做实意动词，和其它动词是一样用法。
做实意动词时,need to do, need doing sth.
按照这两个用法，A. B. C. D.都对。
但是A.中没有用被动语态。
B.have examined 表示现在完成时。没有被动
C.有被动语态，但是形式是：现在...

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C不对need doing something 是表被动的