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第16讲 一般现在时和现在进行时

一般现在时 一.定义: 一般现在时表示现在经常反复发生的动作、存在的状态或习惯性的动作的时态 二.结构: 主语+动词原形/ 动词的单三形式+其他 主语+be 动词+其他 三.词形变化:一般现在时用行为动词的原形,但第三人称单数作主语时,动词的词尾变化规则: 1.一般的动词词尾+s 2. 以 sh /ch /s/x/o 结尾的词+es 3 以辅音字母+y 结尾的把 y 变成 i,+es。 4.have 变为 has 四.句型变化:找助动词 do 和 does 要借助动词变为问句和否定句。在作回答时也要用 do 或 does 的形式。 否定句:用主语+don't / doesn't+动词+其他。例如: 1. I don't have an English book. 2. She doesn't have a new bike. 一般疑问句中,用Do / Does+主语+动词+其他。例如: 1. Do you have an English book? Yes, I do. (No, I don't.) 2. Does she have any friends? Yes, she does. (No, she doesn't.) 特殊疑问句中,用特殊疑问词+do/ does+主语+动词+其它。例如: 1. What do they have? 2. How many friends does Lucy have? 五.标志词:时间状语及副词: always, usually, regularly, every morning/night/evening/day/week, often, rarely, sometimes, from time to time, twice a week, seldom, once a month, ever, never. 课堂练习: 用连系动词 be( am, is, are)的正确形式填空。 1. ______ you fine? 2. I _________ Mr. Chen. 3. _____ he your mother? 4. -- ______ they from Japan? -- Yes, they _______. 5. You ________ a teacher and she _____ a doctor. 6. Where _______ Jack from? 7. I _______ fine, too. Thanks 8. -- Who _______ this? -- This ________ Wang Kang. 9. -- ____ you a student? -- Yes, I _____. 10. -- Where _______ Beijing? -- It_______ in China. 用所给动词的适当形式填空。 1. My classmate ______ (know) the man on the bike. 2. His sister usually ______ (go) to school at 7:00 am. 3. Lin Tao ______ (like) his new sweater. 4. ______ he ______ (like) English? 5. He ______ (not know) the teacher’s name. 6. ______ you ______ (can see) the bananas on the table? 7. He ______ (have) an egg and a banana for breakfast. 8. Li Min ______ (take) a shower after lunch. 9. People usually ______ (eat) dinner in the evening. 10. What time ______ Mary usually ______ (play) basketball ? 13.按照要求改写句子 1. Daniel watches TV every evening.(改为否定句) 2. I do my homework every day.(改为一般疑问句,作否定回答) 3. Amy likes playing computer games.( 对划线部分提问) 4. We go to school every morning.(改为否定句) 5. He speaks English very well.(改为否定句) 现在进行时 定义:现在进行时表示现在正在进行的动作或是现阶段正发生而此刻不一定在进行的动作。 构成: 现在进行时由be+v-ing构成。be 应为助动词 v-ing 为现在分词形式: 词形变化: (1)一般情况下直接加 think---thinking sleep---sleeping study---studying speak---speaking (2)以不发音的字母 e 结尾的单词,去掉字母 e(元+辅+e),再加 ing wake---waking make---making come---coming take---taking leave---leaving have---having (3)以 ie 结尾的动词,把 ie 改为 y ,再加 ing lie---lying (4)以重读闭音节结尾,呈现“辅,元,辅”结构的动词,先双写末尾的辅音字母,再加 ing stop---stopping sit---sitting run---running forget---forgetting begin---beginning 句型变化:与 be 动词的句型变化一样(此处略去 500 字) 用法:

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