为什么不可以说sit down by the table?为什么不是sit down by the table,而是sit down at the table?

为什么不可以说sit down by the table?为什么不是sit down by the table,而是sit down at the table? sit down -----sit的t发音吗? 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 sit on the floor为什么不可以说sit on floor?the在这里做什么用?还有,为什么不可以说What`s problem? the teacher didn't sit down until he saw every student already had a chair____A to sit B to sit down C to sit at D to sit on 原因是什么呢 其他选择为什么不能选 please sit down everybody改为一般疑问句everybody不是三单么,为什么不用doesn't原因 After supper she would sit down by the come here and sit down,为什么不用come here and to sit down Would you sit down and have a coffee with us?A It doesn't matterDThat's very kind of you 请问为什么A不可以.是固定用这个吗? Come and sit down by the fire.Your hands cold. A.have been felt B.feel C.are felt D.have felt为什么？ The hostess ________ until the guests were seated.A.sat down B.was sitting down C.was to sit down D.didn’t sit down Do sit down,want you?为什么用want you? 为什么sit后有时候加down有时候加on DOWN BY THE BUS STOP为什么用DOWN BY? This chair is comfortable --------( )A.to sit B.to seat C.to sit on D.sit down 为什么选C Why don't you can say no?为什么你不可以说不?是这样翻译吧. class sit down Sit down,please.