sweep the floor为什么加the

sweep the floor为什么加the Mum sweep the floor.(sweep）用加s吗? sweep the floor clean the floor区别 He____can sweep the floor.can前面加什么? Mike's sweep the floor. You must sweep the floor. me,floor,sweep,let the I (sweep) the floor now. Let him____( sweep) the floor sweep the floor的音标 sweep the floor的中文 robot/the/can/sweep/floor/the