English汇编.pptx

Contents 1. 一般现在时及其用法 2. 名词的数 3. 名词所有格 4. 5种基本句式结构 一般现在时态 定义：表示经常性习惯性的动作或存在的状态。 时间状语：always 总是，often 经常，usually通常 sometimes有时候 nearly几乎不 never 从不，everyday+ 年与日，once，twice at …在几点钟动词的变化：只有在第三人称单数用动词的“三单变化”，其他用动词的原形。 　 一般现在时态 三单变化： （1）直接在动词词尾加-s.　　ask---asks???? work---works? get---gets????? stay---stays（2）以字母s, x, ch, sh或o结尾的动词，在词尾直接加-es.　　watch---watches?? wish---wishes? fix---fixes???????? do---does　　go---goes???????? pass---passes（3）以“辅音字母加 - y”结尾的动词，要先变y为i再加-es.　　try---tries???? study---studies cry---cries????? fly---flies2.不规则变化：　　be---- is? are??? have----has do ---does 用法 1. 表示经常性，习惯性的动作或存在的状态.通常与副词sometimes, often, usually, always, every day (year, month ), once (twice, three times) a day,等时间状语连用。　 They usually go to school by bike.　　I take the medicine three times a day.　　She helps her mother once a week.　　.　　 用法 2. 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 Saturday. Mary’s father is a policeman. There are 80 students in the classroom. 句子转换 1）当句子中有be动词或情态动词时，则把be动词或情态动词(can,could等等)提到主语的前面变成疑问句;在be动词或情态动词后面加not变成否定句.　　 例：①陈述句：She is a student.　　疑问句→ Is she a student??　　否定句→ She is not a student. 　　②陈述句：I can swim.　　疑问句→ Can you swim　　否定句→ I can not swim.　　 句子转换 （2）?? 当句子中即没有be动词，也没有情态动词时，则在主语前加助动词do (you,以及复数), does（单数she,he,it）变成问句；在主语后谓语动词前加助动词don’t（I,you,以及复数), doesn’t（单数she,he,it）变成否定句，助动词后的动词要变成动词原形。　　例：①陈述句：We get up at 7:00 every morning.　　疑问句→Do you get up at 7:00 every morning?　　否定句→We don’t get up at 7:00 every morning. 　　②陈述句：She has a little brother.　　 疑问句→ Does she have a little brother?　　否定句→ She doesn’t have a little brother. 练习 用动词的适当形式填空 　　1. She _________(go) to school at seven o’clock.　　2. It’s 6? o’clock. They are _________ (eat) supper.　　3. He usually ___________ up at 17:00.(get )　　4. She ___________ (live) in Beijing.　　5. Amy _________ (be) here just now.　　6. _______ (be)there