Amy sat on the grass beside the river.过去式,Amy sat on the grass beside the river。这个句子的过去式怎么写啊，小弟在此谢过，

Amy sat on the grass beside the river.过去式,Amy sat on the grass beside the river。这个句子的过去式怎么写啊，小弟在此谢过， 求翻译!we sat on the dry grass with our backs on the wall the whole family sat on the s＿＿＿ grass to have a picnic sheep f____ on the grass . in the grass on the grass怎么区分? 草丛里有条蛇是on the grass还是in the grass? Sit on the grass.还是 Sit in the grass? in the grass 与on the grass的区别 the sign on the grass是什么意思 don't walk on the grass=? on the grass 用中文怎么说 What can you see on the grass? Don't_____（践踏）on the grass. walk on the grass的意思 Peter,__________(not walk) on the grass. in the snow还是on the snow,in the grass还是on the grass What were you doing this time yesterday?-I on the grass and drawing a picture.A.sit B.sat C.am sitting D.was sitting hould walk on the grass.（改为否定句) You_____ _____ walk on the grass.