为什么该句中的look当系动词可以用被动.

问题描述:

为什么该句中的look当系动词可以用被动.
Photography did not replace other fine arts because
people felt the image looked cheap in relation to the other arts.
感官动词look后面加形容词,为什么不说people felt the image looks cheap?

felt the image looked cheap ,looked cheap 在此可做宾补理解,形式为过去分词短语