一、 重点语法解析 Past now Yesterday , we Now , the classroom cleaned the classroom. is clean because we have c...
终止性动词的用法特征 1.终止性动词可用来表示某一动作完成，因此可用于现在完成时。如： The train has arrived.火车到了。 Have y...
一、 单项选择。 1 、 Both his parents look sad . Maybe they _________what's happened to him.（呼和浩特） A. knew...
现在完成时与现在完成进行时比较练习 A. Correct the follow ing sentences.（改错） 1. All these years they are contribut...
