She _look down upon_ Tom for his poor manners.这句话里的look是用原型吗?需要加ed吗?

问题描述:

She _look down upon_ Tom for his poor manners.这句话里的look是用原型吗?需要加ed吗?

用looks 或looked都可以
不能用原形 因为she是第三人称单数