四种时态讲解*定义，常见标志词，基本结构一、一般现在时：1. 定义：描述现在或经常性的动作或状态I am a student.I usually go to school by bus.She usually goes to school by bus.My teacher told me that the sun rises in the east yesterday.I will discuss this with you when we meet next time.If it rains tomorrow, the school meeting will be put off.2. 常见标志词：___________________________________________3. 基本结构：__________________________________________二、一般过去时：1. 定义：表示过去发生的动作或状态I was a student, but now I am a teacher.I went to school by bus yesterday morning.2.常见标志词：______________________________________________________________ ______________________________________________________________ 3. 基本结构：_______________________________________________________________三、过去进行时：1.定义：表示过去某一时间点或时间段正在进行的动作The girl was singing songs in the classroom this time yesterday.At that moment, we were having dinner together.I was writing a letter when you phoned.2.常见标志词：________________________________________________________________ ________________________________________________________________ 3.基本结构：________________________________________________________________四、过去完成时：1.定义：表示过去某一时间或动作之前已完成的动作By the time I arrived at the station, the train had left.By nine o’clock he had worked for seven hours.2. 常见标志词：________________________________________________________________ 3. 基本结构：____________________________________________________________________*常见的规则动词表*常见的不规则动词表 （见书本P82~83）* 练习题一、填写下列表格动词原形 过去式 过去分词现在分词put drink read fly teach meet give come think forget二、用动词的适当形式填空1. He ___________(read) English every day.规则 动词原形 过去式 过去分词一般情况加-ed help helped helped look looked looked以不发音的-e 结尾的动词，加-d like liked liked live lived lived以“辅音字母+y ”结尾的，变y 为i 加-ed try tried tried study studied studied 以重读闭音节结尾，且词尾只有一个辅音字母的动词，双写最后辅音字母+edplan planned planned stopstoppedstopped2.I usually___________(get) up at 6:30.3.The sun ___________(rise) in the east and _________(set) in the west.4.It________(take) me two hours to finish my homework last night.5.The teacher told us the earth_________(move) around the sun.6.She ______________(buy) a sweater yesterday.7. I _______________(write) when you phoned.8.If she _________ (come) to my school, I will show her around.9. If it_____________(rain) tomorrow, our sports meeting will be canceled.10. By the time I reached the train station, the train_____________(leave).11. I _____________(walk) in the park when it began to rain.12. He ________________ (work) in the factory for five years before he moved here.13. She often _____________ (play) badminton with me on weekends.14. Tom is from China. He _____________ (speak) Chinese.15. By the end of yesterday, I ________________ (finish) my English homework.三、单句改错1.The teacher said that the moon went around the earth.2.We have learned an English song by the end of last term.3.She usually do her homework after dinner.4.We were playing tennis last night.5.I was doing my homework when the teacher comes in.6.If it will rain tomorrow, I will not go shopping with my friends.7.The train left before I arrived at the station.8.She becomes an English teacher two years ago.四、语法填空Tom’s grandma lived in the countryside. Tom visited ___________(1) (she) every summer. Tom was ____________(2) naughty (调皮的) boy. He often did something bad every time he visited his grandma.One summer, Tom visited his grandma as usual. But he behaved very __________ (3) (different) that time. He was very quite instead of _____________ (4) (run) here and there. He just sat in the house, reading a book or watching TV. Tom’s grandma was very happy to see that. At the same time, she was confused, thinking ______________ (5) Tom changed so much.One day, while Tom ______________ (6) (watch) TV in the sitting room again, his grandma asked him to go out and play with other boys. Although she expected him to be on his best __________ (7) (behave), she didn’t want her grandson to get bored. However, Tom refused __________ (8) out. He said, “My mother told me that every bad action turn one _______ (9)your hairs gray. She said you’d die if all your hairs turned gray. I don’t want you to die.”Tom’s grandma was really moved when she ______________(10)(hear) Tom’s words.五、短文改错I happen to meet some American tourists at the gate of the Summer Palace last week. I greeted them with English and then we began to chat. I got to know that they were college student traveling in China. Most of us were fond of traditional Chinese medicine. They were busy taking pictures and were surprising at the changes had taken place in the past few years. After that, we went boat and had a good time. We were exchanged our e-mail addresses so that we could write to each other in the future. They thank me again and again. I was gladly to have a chance to practice my oral English. What a wonderful experience!。