句式转换:1.Swim in the river,please.(改为否定句) 2.The children are (
句式转换:1.Swim in the river,please.(改为否定句) 2.The children are (under the tree)括号提问
3.An old man is on the left of the bus.(改同义句)
4.The gate is here.(改倒装句)
5.There is a child behind the door.(改成复数)