八年级英语重点时态.doc

八年级英语重点语法分析泾川二中 郭爱琴一. 一般现在时: (1)表示现在的状态, 例如:Hes twelve. (2)表示经常性的或习惯性的动作,例如:I go to school every day. (3)表示主语具备的性格和能力, 例如:She likes apple.常与often, usually, sometimes, always, every day等表示经常性的或习惯性的时间状语连用.1. 肯定句结构: (1) 行为动词:a. 第一、二人称,复数人称: They/We/You+动词原形. 例如:They go to school every day.b.第三人称单数: He/She/It+动词-s/es 例如:Lily often likes singing. (2)系动词(be): I am. They/We/You are He/She/It is 2.否定句结构: (1) 行为动词: a. 第一、二人称,复数人称: They/We/You+dont+动词原形. 例如:They dont go to school every day.b.第三人称单数:He/She/It+doesnt +动词原形 例如:Lily doesnt like singing.(2)系动词(be): 在is/am/are后加not 例如:I am not a worker.3. 一般疑问句结构:a. 第一、二人称,复数人称: Do+they/we/you+动词原形. 例如:Do they go to school every day? （Yes, they do. No, they dont.）b.第三人称单数: Does +he/she/iIt+动词原形 例如: Does Lily often like singing? (Yes, she does. No, she doesnt.) (2)系动词(be):把is/am/are提在主语前. 例如:Are you a worker? (Yes, I am. No, Im not.)二.现在进行时: 表示现在正在进行的动作或发生的事情.常与now, look, listen等表示现在状态的时间状语连用.1.肯定句结构: 主语+is/am/are+动词-ing例如: The boys are playing football now. 2.否定句结构: 在is/am/are后加not例如: The boys arent playing football now.3. 一般疑问句结构: 把is/am/are提在主语前. 例如: Are the boys playing football now? (Yes, they are. No, they arent.)三.一般过去时:表示过去某个时间发生的动作或存在的状态.常与yesterday, last, ago, in1990等表示过去状态的时间状语连用.1. 肯定句结构:(1) 行为动词: 主语+动词的过去式例如: The twins went to school two hours ago. (2) 系动词(be): I/ He/She/It+was They/We/You+were 例如: I was at home last night.2.否定句结构:(1) 行为动词: 主语+didnt+动词原形例如: The twins didnt go to school two hours ago.(2)系动词(be): 在was/were后加not例如: I wasnt at home last night.3. 一般疑问句结构:(1) 行为动词: Did+主语+动词原形?例如: Did the twins go to school two hours ago? (Yes, they did. No, they didnt.)(2)系动词(be): 把was/were提在主语前.例如: Were you at home last night? (Yes, I was. No, I wast.)四.一般将来时: 表示将来某时将要发生的动作或存在的状态,也表示将来经常或反复发生的动作.常与tomorrow, next等表示将来状态的时间状语连用.1. 肯定句结构: (1)用于书面语: 主语+will+动词例如: We will come to see you tomorrow (2)用于口语: 主语+am/is/are going to+动词例如: Tom is going to see his uncle next Sunday.2.否定句结构:(1)用于书面语: 在will后加not例如: We wont come to see you tomorrow. (will not=wont) (2)用于口语: 在is/am/are后加not.例如: Tom isn going to see his uncle next Sunday.3. 一般疑问句结构:(1)用于书面语: 把will提在主语前.例如: Will you come to see you tomorrow? (Yes, we will. No, we wont.)(2)用于口语: 把is/am/are提在主语前.例如: Is Tom going to see his uncle next Sunday? (Yes, he is. No, he isnt.)五.情态动词: can(能，会)， may（可以，可能，也许）， must(必须，一定，应该） have to（必须，不得不）1. 肯定句结构: 主语+can/may/must+动词例如: I must go now.2.否定句结构: 在can/may/must后加not. 例如: I mustnt go now.3. 一般疑问句结构: 把can/may/must提在主语前. Must you go now? (Yes, I must. No, I neednt.) May I open the window? (Yes, you may. No, you neednt.)六.had better+动词原形，表示“最好干”，变否定句时在had better后加not.例如:You had better catch a bus. Youd better not catch a bus. (You had= Youd ) 七.动词不定式：want /forget /remember /would like /go + to + 动词原形 例如: I want to get back my book. Lucy went to see his mother las