初一四种基本英语时态.doc

PAGE  PAGE 3 1．一般现在时： 1）一般现在时表示经常发生或习惯性的动作或状态及客观现实和普遍真理。一般现在时常以动词原形表示，但当主语是第三人称单数时，动词词尾加-s或-es。 2）句型结构：主语＋Ｖ.（包括be动词）＋宾语＋… She is an engineer. He has breakfast at 6:00every day. 3）注意： a)一般现在时通常与always , often , usually , every day , sometimes , once a week 等时间状语连用。 I always watch TV at 8:00 in the evening. They go home once a week. We usually do our homework at home. b)表客观现实或普遍真理。 The sun always rises in the east. The light travels faster than the sound. c)表永远性的动作或状态。 He lives in the country. 4）第三人称单数变化形式。 a)一般情况动词在词尾加-s . comecomes speakspeaks workworks livelives b)以o, s, x, ch, sh结尾的单词在词后加-es. dodoes gogoes finishfinishes brushbrushes fixfixes passpasses watchwatches c)以“辅音字母＋y”结尾的单词变y为i加-es. Studystudies carry-carries crycries d)以“元音字母＋y”结尾的单词直接加-s. Playplays staystays 5）否定句和疑问句。 Eg：　a)He is an engineer. He isn’t an engineer. Is he an engineer? Yes, he is. / No, he isn’t. b) We get up at 7:30 in the morning. We don’t get up at 7:30 in the morning . Do you get up at 7:30 in the morning? Yes, we do. / No, we don’t. c) He likes music. He doesn’t like music. Does he like music? Yes ,he does./ No, he doesn’t 练习：我们每天晚上九点做作业。　 他喜欢音乐。 　　　　 地球围绕太阳转。 火车六点出发。 　　　　 他每天七点去上班。　 我们经常下午打篮球。 2．一般过去时 1）一般过去时表示发生在过去的动作或存在的状态，通常与表示过去的时间状语yesterday, last night ,some years ago, in 1990,in those days.等连用。 Eg: I was a student 6 years ago. I went to Beijing last year. They saw a film last night. 2）句型结构：主语＋??.过去时＋宾语＋… 3）否定句和疑问句。 a) He was busy yesterday. He wasn’t busy. Was he busy? Yes, he was. / No, he wasn’t. b) He smoked last year. He didn’t smoke last year. Did he smoke last year? Yes, he did. /No, he didn’t. c) He joined the army in 1990. He didn’t join the army in 1990. Did he join the army in 1990?