课件：一般现在时现在进行时及一般过去时.ppt

可编辑 可编辑 时态大比拼 时态大比拼 在英语中，不同时间发生的动作或存在的状态要用不同的动词形式来表现。 每种时态的概念、信息词、结构、句式变化、以及某些时态间的相互区别 重点掌握 时态 Tense 时态 现在进行时： 一般现在时： 一般过去时： 现在正在进行的动作 经常或习惯性的动作或存在的状态。 过去某个时间或时间段发生的动作或存在的状态。 (The Present Continuous Tense) (The Simple Present Tense) (The Simple Past Tense) 各时态常用的信息词 现在进行时： 一般现在时: 一般过去时: now , Look! Listen! at this time Where is …? Don’t talk! It’s 8:00am. always , usually, often, sometimes ,seldom, never, every day, every… ,three times a day last night, last…, two days ago, …ago, in 1999, in +过去的年份, just now =a moment ago, yesterday, yesterday morning 判断下列信息词是属于哪种时态 last night now every day Look! yesterday often Listen! two years ago always in 1897 three times a week 一般现在时 一般过去时 现在进行时 改一般疑问句的方法： 改否定句的方法： ①首先看有无be动词，如果有，将be提到句首并大写，句末打问号. ②如果没有be动词，看原句的动词形式来决定借用助动词do/does/did,并且行为动词要还原。 V-原形 V-s/es V-ed(过去式) +动词原形…? 以此类推 ①首先看有无be动词，如果有，在be 动词后面加not. ②如果没有be 动词，看原句的动词形式来决定借用助动词do/does/did,并在后面加not,并且行为动词要还原。 主语+don’t/doesn’t/didn’t+动词原形 Do… Does… Did… He is a teacher. 2. Kangkang comes from China. 3. I usually take the bus to work. 4.They are having classes. 5.Jane played the guitar last night. 先（一般疑问句） 再（否定句） Is he a teacher? He isn’t a teacher. Does Kangkang come from China? Kangkang doesn’t come from China. Do you usually take the bus to work? I don’t usually take the bus to work. Are they having classes? They aren’t having classes. Did Jane play the guitar last night? Jane didn’t play the guitar last night. 句型变化操练 现在分词 的构成： 动词第三人称 单数的构成： 过去式 的构成： ①直接加-ing. ②重读辅元辅，双写尾字母加-ing. ③以e 结尾去e加-ing . ①直接加-s. ②以s, x, ch, sh, o结尾加-es. ③以“辅音+y “结尾变y 为i再加-es. ①直接加-ed. ②以e结尾只加d. ③重读辅元辅，双写尾字母再加-ed. ④以“辅音+y”结尾变y 为i 再加-ed. THANK YOU SUCCESS * * 可编辑 have - look - begin- use- shop- get- dance- study- 现在分词 第三人称单数 过去式 study- finish- have- go- do- play- watch- give- need- stop- hope- play- try- plan- visit- like- having looking beginning using shopping getting dancing studying studies fin