初一下语法专项预习之时态.ppt

The price ___, but I doubt whether it will remain so. went down will go down C. has gone down D. was going down The price ___, but I doubt whether it will remain so. went down will go down C. has gone down D. was going down 表示已发生的动作 All the preparations for the task___, and we’re ready to start. completed complete C. had been completed D. have been completed My dictionary ____. I have looked for it everywhere but still ____ it. A. has lost; don’t find B. is missing; don’t find C. has lost; haven’t found D. is missing; haven’t found My dictionary ____. I have looked for it everywhere but still ____ it. A. has lost; don’t find B. is missing; don’t find C. has lost; haven’t found D. is missing; haven’t found 过去的动作对现在的影响。 （一）、现在进行时 （二）、一般过去时 （三）、现在完成时 (一). 现在进行时 [语法讲解] 1. 现在进行时的基本用法: 1) 表示说话时正在进行的动作: 常和now连用，有时用一个动词如look（看）、listen（听）来表示now（现在）这一时间概念。 Look！A dog is running after a cat. Listen！He is playing the piano. 2) 表示现阶段正在进行着的动作: 但不一定是说话时正在进行。常和at present（目前）、this week（本周）、these days（这几天）等时间状语连用。 What lesson are you studying this week？ 你们本周学哪一课了？（说话时并不在学） 3) 现在进行时有时可用来表示一个在最近按计划或安排要进行的动作即是说可以用来代替将来时，但此时，一般要与表示将来的时间状语连用，而且仅限于少量动词。如：go（去）、come（来）、leave（离开）、start（开始）、arrive（到达）、return（返回）、… How many of you are coming to the party next week？ She is leaving for Tianjing tomorrow. 2. 基本构成：be + doing 现在分词的几种改变方式： 1）动词+ing：play（游玩）—playing， study（学习）—studying 2）去e+ing： write（写）—writing，make（做）—making，take（取）—taking 3）双写词尾+ing：stop（停止）—stopping，cut（砍）—cutting，sit（坐）—sitting 4）特殊变化：lie-lying, die-dying [ 边讲边练] 用动词适当形式填空： 1) What are you _________(do) now? I ___________(eat) bread. 2) It’s nine o’clock. My father_____________(work) in the office. 3) Look, the boy ____________(put) the rubbish into the bin. 4) __________he__________ (clean) the classroom? No, he isn’t. He ____________ (play). 5) Where is Mark? He ___________(run) on the grass. 6) Listen, who ____________(sing) in the music room? Oh, Mary ________(sing) ther