Seating myself,I began to eat.中为什么要用seating啊

seating 这句话里为什么用seated而不用seating? 高中独立主格的问题He seating himself at the desk, his mother began to I was surprised to find him _ under the tree.A.sat B.seating I found him_in an armchair.A:seated B:seating.选哪个,为什么? Please remain--------?为什么答案是seated而不是seating?remain seating不 第六个为什么填seated不是seating,求仔细讲解 ---myself,i began to eat.A Be seated B.Seated C.Seat D.Seati remain seating 和remain seated remain seating和 remain seated Seating和Seated的用法 When I arrived, I found the boy_____there A seating B seated