高中英语 Unit23 Grammer导学案 北师大版选修8

1、Unit23 Grammer Learning Aims:（学习目标）Step1:Revision(知识回顾)提问上节课学的部分知识点。Step2: Check preview（检查预习）Ask some students to translate the sentences in red in the text.Step3:Self-study and Cooperation（自主学习与合作探究） 时态是英语中一个重要的语法范畴，它表示不同时间发生的动作或存在的状态以及动作发生或存在的方式。动作发生的时间可分为现在、过去、将来和过去将来四种形式，动作发生的方式可分为一般、完成、进行和完成进行

2、四种形式。将这时间形式和动作方式结合起来，就构成了以下16种时态形式(以do为例)： 一 般完 成进 行完 成进 行现 在现在一般时do现在完成时have done现在进行时is doing现在完成进行时have been doing过 去过去一般时did过去完成时had done过去进行时was doing过去完成进行时had been doing将 来将来一般时will do将来完成时will have done将来进行时will be doing将来完成进行时will have been doing过去将来过去将来一般时would do过去将来完成时would have don

3、e过去将来进行时would be doing过去将来完成进行时would have been doing注：构成时态的助动词be (is, am, are), have (has, have), shall, will 等需根据主语的变化来选择。在这16种时态中，其中有8种时态是最重要的，也是用得最多的，是初学者必须要掌握的，它们是一般现在时(也称一般现在时)、一般过去时(也称一般过去时)、一般将来时(也称一般将来时)、现在进行时、现在完成时、过去进行时、过去完成时、过去将来一般时(也称过去将来时)，其余的时态相对用得较少。Step4: Doing exercises（课堂检测）1When I

4、 first met Bryan I didn't like him，but I _ my mind.Ahave changed Bchange Chad changed Dwould change 2. We _ very early so we packed the night before.Aleave Bhad left Cwere leaving Dhave left 3Shakespeare's play Hamlet_into at least ten different films over the past years.Ahad been made Bwas

5、made Chas been made Dwould be made 4Do you think Mom and Dad_late?No. Swiss Air is usually on time.Awere Bwill be Cwould be Dhave been5Hurry up! Mark and Carol_us.Aexpect Bare expecting Chave expected Dwill expect6The water supply has been cut off temporarily because the workers _ one of the main pipes.Ahad repaired Bhave repaired Crepaired Dare repairing 7I felt very tired when I got home, and I_straight to bed.AgoBwent Chad gone Dhave gone8A Midsummer Night's Dream_at the Theatre Royal on 19th June, and then tours throughout Scotland.Aopens Bis opened Cwill open Dwill