Sit down on this chair.改为否定句

Sit down on this chair.改为否定句 This chair is comfortable --------( )A.to sit B.to seat C.to sit on D.sit down 为什么选C sit down 和 put on 反义词是什么 Sit down on the chair.是什么意思 sit man this cannot down old连词成句 sit on 和sit down的区别please give me a bench ()A.to sit down B.to sit on为什么选B 不选A 为什么sit后有时候加down有时候加on you look so tired,come on ahd sit down,please. he wanted to find a seat to sit down还是sit on?不管上一个句子用哪一个,为什么he entered the lecture hall hoping to find a seat to sit on这个句子用sit on而不是down, class sit down Sit down,please. sit down怎么读 英语Sit down,please, sit down的意思 Sit down,piease. Sit down,please是什么意思 sit down,please答语? sit down怎么读