语法专题一般现在时.docxVIP

一般现在时Grammar Summary1动词是表示动作或状态的词。动词有四类：实义动词,也叫行为动词（包括及物动词和不及物动词）、连系动词、助动词和情态动词。2. 英语动词有时态、语态、人称和数的变化。时态是用以表示各种时间和动作方面特点的动词形式。3. 英语动词有五种形式：原形、第三人称单数、过去式、过去分词和动词-ing形式。一般现在时定义一般现在时：表示经常性的事情，经常性的动作或一般性事实。常与一般现在时连用的副词和时间状语：　副词：often 经常，usually通常，always 总是，every每个，sometimes 有时，at …在几点钟，never决不, hardly eve几乎没有…时间状语：every day/week/month/year, every morning/afternoon/evening 一般现在时动词的两种形式：原形和单三式(单数第三人称形式),当主语不是第三人称单数时候,动词一律用原形;当主语是第三人称单数(he, she, it)的时候动词用单三式.e.g. I watch TV every evening He watches TV every evening. They go to school on foot. He goes to school on foot. We like English very much She likes English very much.动词单三式的变化同名词变复数的规则类似: 1.一般的动词词尾+s。如: like---likes,play plays 2.以s, x, sh, ch,o结尾的词+es.如: guess—guesses, fix—fixes, teach---teaches， brush—brushes， watch—watches，catch—catches, go—goes，do—does， 3.以辅音字母+Y结尾的把Y变成 i,再+es。如: study—studies， carry—carries， fly—flies， worry—worries 4.不规则变化 如:have---has be---is 一般现在时用法1、表示现在的状态 They are teachers. I am a student. I am in Class 1,Grade 9.Mary’s father is a policeman.There are 50 students in my class2表示经常性，习惯性,永久性的动作　　They usually go to school by bike.She helps her mother once a week.I get up at six every day. Classes begin at eight. 8点开始上课。3.表示主语具备的性格和能力等。如：She likes basketball games.。He speaks English well. 他英语讲的好Ann Wang writes good English but does not speak well.　4、表示客观真理，科学原理，自然现象，等客观事实或格言，谚语等。　The sun rises in the east and sets in the west every day.　The man who has never been to the Great Wall is not a real man.　 Tomorrow is TuesdayShanghai lies in the east of China.上海市在中国的东部。5．.在时间状语从句和条件状语从句中，常用一般现在时代替将来时。If it rains tomorrow,we won ’t go to the park.When I grow up,I will go to American.6. 以here,there开头的句子用一般现在时表正在发生的动作There goes the bell.铃响了。三、 构成 1. 肯定句：（1）be动词: 主语+ am / is / are +表语 如：They are new students.。 I am tall. 我个子高。 He is from Japan. 他来自日本。（2）行为动词.主语+ 实义动词+ 其它 如：I read English every morning. He usually goes to school by bike. Maria often does her homework