动词时态--一般现在时.ppt
动词的时态动词的时态-一般现在时一般现在时英语时态：英语时态：英语的时态共有十六种，其中常用的有八种，英语的时态共有十六种，其中常用的有八种，也就是我们常说的八大时态，它们是：一般也就是我们常说的八大时态，它们是：一般现在时、一般过去时、一般将来时、现在进现在时、一般过去时、一般将来时、现在进行时、过去进行时、现在完成时、过去完成行时、过去进行时、现在完成时、过去完成时和过去将来时。时和过去将来时。一般现在时：一般现在时：1 1、基本用法、基本用法（1 1）经常性或习惯性的动作，长与表示频度的时间状语）经常性或习惯性的动作，长与表示频度的时间状语连用。连用。时间状语：时间状语：everyevery，sometimessometimes，atat，on Sundayon Sunday，often often，usuallyusually，alwaysalways等。等。EgEg：1.I leave home for school at 7 every morning.1.I leave home for school at 7 every morning.2.My friends often go to the park on Sundays2.My friends often go to the park on Sundays.（2 2）用于表示客观真理、客观存在、科学事实。）用于表示客观真理、客观存在、科学事实。EgEg：1.The earth goes around the sun.1.The earth goes around the sun.2.Shanghai lies in the east of China.2.Shanghai lies in the east of China.注：此用法如果出现在宾语从句中，即使主句是过注：此用法如果出现在宾语从句中，即使主句是过去时，从句谓语也要用一般现在时。去时，从句谓语也要用一般现在时。EgEg：Columbus proved that the earth is round.Columbus proved that the earth is round.（3 3）用于格言或警句中）用于格言或警句中EgEg：1.Where there is a will1.Where there is a will，there is a way.there is a way.2.Pride goes before a fall.2.Pride goes before a fall.（4 4）用于表示现在时刻的状态、能力、性格、个性。）用于表示现在时刻的状态、能力、性格、个性。EgEg：1.I don1.I dont want so much.t want so much.2.She is a good girl and always helps others.2.She is a good girl and always helps others.（5 5）时间、条件、方式、让步状语从句中代替一般将来）时间、条件、方式、让步状语从句中代替一般将来时。时。EgEg：1.If it doesnt 1.If it doesnt rain,wellrain,well go on a picnic.go on a picnic.2.I 2.Ill help you as soon as you have problem.ll help you as soon as you have problem.2.2.句子结构句子结构 （1 1）当句子表状态说明主语是什么或怎么样时，其句型：）当句子表状态说明主语是什么或怎么样时，其句型：主主+be+be动词（动词（am,is,aream,is,are）+表语，否定式是在表语，否定式是在bebe动词后动词后加加notnot，疑问句是，疑问句是bebe动词提前到句首（即在主语之前）动词提前到句首（即在主语之前）EgEg：肯：肯：The twin sisters are from America.The twin sisters are from America.否：否：The twin sisters are not from America.The twin sisters are not from America.疑：疑：Are the twins from America?Are the twins from America?（2 2）当谓语由实义动词充当，主语不是第三人称单数）当谓语由实义动词充当，主语不是第三人称单数时，时，句子结构为：主语句子结构为：主语+动词原形动词原形+其它其它 否定式为：主语否定式为：主语+don+dont+t+动词原形动词原形+其它其它 疑问句为：疑问句为：Do+Do+主语主语+动词原形动词原形+其它？其它？EgEg：肯：肯：We speak Chinese.We speak Chinese.否：否：They dont speak Chinese.They dont speak Chinese.疑：疑：Do you speak Chinese?Do you speak Chinese?当主语是第三人称单数时：当主语是第三人称单数时：句子结构为：主语句子结构为：主语+动词（词尾加动词（词尾加s s或或eses）+其它。其它。否定式为：主语否定式为：主语+doesn+doesnt+t+动词原形动词原形+其它。其它。疑问句式：疑问句式：Does+Does+主语主语+动词原形动词原形+其它？其它？EgEg：肯：肯：He goes to school by bus.He goes to school by bus.否：否：He doesnHe doesnt go to school by bus.t go to school by bus.疑：疑：Dose he go to school by busDose he go to school by bus？动词第三人称单数变化规律：动词第三人称单数变化规律：（1 1）一般情况加）一般情况加-S,-S,清辅音后读清辅音后读/s/,/s/,浊辅音和元音后浊辅音和元音后读读/z/z/。EgEg：swim-swimsswim-swims；help-helpshelp-helps；like-likeslike-likes （2 2）以辅音字母）以辅音字母+o+o结尾的词加结尾的词加 -eses ，读，读/z/z/。EgEg：go-go-goes,dogoes,do-does-does（3 3）以）以s,sh,ch,xs,sh,ch,x等结尾的词加等结尾的词加 -eses ，读，读/z/z/。EgEg：watch-watcheswatch-watches，teach-teachesteach-teaches（4 4）以字母）以字母y y结尾的词，元音字母结尾的词，元音字母+y+y，直接加，直接加I-sI-s，辅音，辅音字母字母+y+y，把，把y y变变i i加加eses，读，读/z/z/。EgEg：stay-staysstay-stays，study-studiesstudy-studies（5 5）不规则变化）不规则变化havehave和和bebe动词动词 ，变，变have have 为为 has has，变，变bebe为为am,is,aream,is,are 。EgEg：have-has have-has；be-be-am,is,aream,is,are
