初中英语动词时态讲解
39页1、初中英语动词时态讲解,Fun With English!,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There 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
2、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 will /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 wont 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
3、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./No, you dont have to.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 ma
4、y be a teacher. Maybe he is a teacher. He may live in this building.,系动词,我们所学过的系动词是 Get,turn,become,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 dancing 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 d
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