1、初中英语动词时态讲解,Go for it!,动词的构成,be 动词 助动词 情态动词 系动词 实义动词,be 动词,be动词的几种形式 am is are was were being Been,be动词的用法,与名词、数词、形容词、介词连用 I am a doctor. He is ten. They are tired. The cat is under the table.,be动词的用法,There be 句型 用于不可数名词和可数名词单数之前There is a pen on the desk.There is some water in the glass. 用于复数名词之前The
2、re are some sheep in the hill. 用于一般将来时There is going to be a film in our school next Sunday. 用于一般过去时There was a book on the desk yesterday. 注意：请根据时态和句中的名词选择适当形式。,be动词的用法,Be 动词在时态中的运用 在现在进行时中We are talking. 在过去进行时中We were talking at this time yesterday.,助动词,助动词的几种形式 do /dont Does/ doesnt Did/ didnt w
3、ill /wont have havent /has hasnt/had hadnt,助动词的用法,对句子进行否定和疑问 Do you get up early every day? I didnt have lunch yesterday. Will you be back soon? He hasnt finished the work yet. 在反意疑问句中 He works in a school, doesnt he? She has never been there,has she? 在倒装句中 They helped the farmers , so did we. I won
4、t visit the famous singer,neither will he.,情态动词,共同特点 情态动词后面跟动词原型 无论否定、疑问、倒装句、或反意疑问句都用情态动词 只有时态变化，没有人称变化,情态动词,解释 can / could 在表示请求允许的时候两者和互换， could比can语气更委婉。 Can I help you? Could you open the window? 在表示有能力作某事时，could是can的过去式。 I can swim. I could swim at the age of five.,情态动词,解释 Must /have toMust 表示主
5、观意愿，否定句用Mustnt，否定回答用needntI must go now.You mustnt play in the street.Must I clean the room now?No,you neednt.have to表示客观条件的限制的“不得不”，它有时态和人称变化，需要助动词来否定和疑问。I dont have to carry the big box.He had to wash his clothes.,情态动词,解释 May 表示请求别人允许。 May I use your bike? 表示可能性。 He may be a teacher. He may live i
6、n this building.,系动词,我们所学过的系动词是 Get，turn，be come，be动词 感观动词look，sound，smell，taste，feel 系动词只和形容词连用，构成系表结构 I feel hungry. The day gets longer and longer. He looked happy.,实义动词,实义动词指的是有具体行为意思的动词。 实义动词在句中可以做谓语动词和非谓语动词。 做谓语动词的用法动词会有四种形式：单三，现在分词，过去式，过去分词,实义动词,注意：掌握四种形式的变化规律 He works in the office. We are d
7、ancing together. I caught a cold last week. She has watered the flower.,实义动词,做非谓语动词的用法（指出现在谓语动词之后的动词，它受前面谓语动词的限制）动词会有三种形式： 原型(do) 动名词(doing) 不定式(to do),实义动词,用原型： let sb.do make sb.do help sb.(to)do had better do,实义动词,用动名词： like doing enjoy doing finish doing 介词之后用动名词 be good at doing what about doin
8、g thank you for doing,实义动词,用不定式： want to do decide to do plan to do would like to do learn to do tell sb.( not)to do ask sb.(not) to do,实义动词,注意下列词不同形式的不同用法:remember doing/to doforget doing/to dostop doing/to dogo on doing/to do,时态,一般现在时 一般将来时 一般过去时 现在进行时 现在完成时 过去进行时 过去将来时 过去完成时,一般现在时,表示一般情况和经常发生的动作。
9、 时间状语为 every day 或 every 引导的时间状语 often，always，usually,一般现在时,动词碰到第三人称单数时，要加 “s” work - works 辅音字母和“y”结尾的词，如carry - carries 以s、x、ch、sh结尾的加“es”，如wash - washes go - goes do - does have - has,一般现在时,例句 He goes to school on foot every day. We often have supper at home. She doesnt do her work every Sunday.,
10、现在进行时,表示正在发生的动作。 时间状语：now /Look /Listen 由be动词动词ing构成 动词变化加ing clean - cleaning 以不发音“e”结尾的，去掉字母“e”，再加ing make - making 重读闭音节的单词，双写最后一个字母，再加ing swim - swimming,现在进行时,例句 The boys are playing now. Look! They are planting trees. Listen! He is singing.,一般过去时,指过去发生的动作或事情 时间状语： yesterday 引导的词组 ago 引导的词组 last 引导的词组 the day before yesterday,一般过去时,动词变化：动词变成过去式，动词加“ed” Play - played 辅音字母和“y”结尾的词，如carry - carried 重读闭音节的单词，双写最后一个字母，再加ed stop - stopped 不规则动词见书后动词表,一般过去时,例句 He bought a book yesterday. I watched a match last week. He left here two days ago.,
