基于情境的英语语法教学基于情境的英语语法教学第十一章第十一章 动词的语态动词的语态 What has changed in the classroom?guessing gamelead inlead inhave/has beendone(过去分词过去分词)1.1.The lights The lights have been turned off.have been turned off.2.The blackboard2.The blackboardhas been cleaned.has been cleaned.3 3.The door.The doorhas been has been closedclosed.4 4.The windows.The windows hahaveve been been openedopened.5 5.The floor .The floor has been has been cleanedcleaned.现在完成时表示动作现在完成时表示动作发生在过去发生在过去,到到现在现在已经完成已经完成或或对现在仍有影响对现在仍有影响。注：现在完成
