英语改错：it seem that mary is the most beautiful of the 3.seem改成什么?

英语改错：it seem that mary is the most beautiful of the 3.seem改成什么?
英语改错：it seem that mary is the most beautiful of the 3.
seem改成什么?

英语改错：it seem that mary is the most beautiful of the 3.seem改成什么?
seem改成seems,因为主语是it,第三人称单数

这句话用的是一般现在式，应该改成seems