现在进行时详细讲解及配套练习（35张）

　　　现在进行时 * 教学重、难点： 现在进行时的巩固及运用。 2. 现在分词的构成。 3.过去进行进的巩固及运用。 * 知识要点： 一.现在进行时的定义: 现在进行时是表示现在、说话瞬间正在进行的动作；或现阶段正在进行的动作，虽然此时此刻动作不一定进行. Eg: Jenny is watching TV now. I am writing. * 二.现在进行时的谓语结构: 1. 现在进行时的谓语结构为:am/is/are +现在分词.be动词的选择运用由句子的主语人称或数决定，它在现在进行时句子谓语结构中作助动词用，无词义。 A: I am watching TV at home. B: Dave is cleaning the floor. C: The students are seeing a movie. * 2. 变否定句时，be后not加上去. 　　　　　　　　　　　　　　　　　　　　　　　　　　　Eg: Steve is talking to his teacher -------Steve isn’t talking to his teacher. The children are eating some apples at my home. ---------The children aren’t eating any apples at my home. 3.变疑问，将be移至主语前。 Eg: Steve is talking to his teacher.---------- Is Steve talking to his teacher? I am singing.--------- Are you singing? * ４.　特殊疑问句：疑问词+ are/is+主语+ving.+其他？ e.g. What are you doing? What is she doing? Where are you cleaning the hous