前者是宾语补足语,后者是宾语从句“I can see Mike singing in the room ”这里的“singing in the room”是补充说明宾语发生的动作,所以是宾语补足语.”I can see Mike is singing in the room“可以理解成”I can ...那是不是两句都正确呢，I can see Mike ——（sing) in the room 考试时该填singing 还是is singing最好填sing,因为出题者想考的是关于seesbdoingsth这个句型结构