stand up的反义词是: sit downStandup.Sitdownandwrite.站起来，坐下去，继续写。

Standup.Liedown.Standup.Sitdownandwrite.站起来，躺下去。站起来，坐下去，继续写。Sitdown.Open yourbooks.Closeyour books.Standup.坐下。打开书。合上书。起立。If youstandupseventimes, sitdown eight.站起来七次，坐下去八次。Whenyoustandup,Iwillsitdownonyourchair.当你站起来的时候，我将要坐在你的椅子上。If youstandupeleventimes, sitdownadozen.站起来11次，坐下去12次。Why didyousitdown Standup.你怎么就坐下了？快起来。Standup,please. /Sitdown, please.请站起来。/请坐下。Standup,please.Sitdown, please.Open yourbook.Close yourbook.请起立。请坐下。打开书。关上书。Standup,sitdown.起立，坐下。youdaoSitdown,drank,standup, drank.坐下，喝，起立，喝。Sitandwrite.Standup.Sitback down. Write some more.坐着写，站起来，坐回去，接着写。Standup,sitdown,turnaround.站起来，坐下去，转个圈。Standup, andbow.Sitdown,sitdown.起立，坐下，举手，手放下，起立，鞠躬，坐下。Sitdown.Standup,please.坐下，请起立。