standup和sitdown,below和under区别图解

stand up sit down
we learnt stand up sit down go to the bathroom drink water
standupsitdownopenthewindowopenthedoorseeyouwindowdooractivity2
point to 指向 2 stand up 起立 3 sit down 坐下
be a polite boy/girl(做一个有礼貌的男孩/女孩 sit down 1.