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1、时态概念结构关键词一般过去时表示过去发生的动作或存在的状态动词变为过去式过去的时间词：yesterday, last week, three years ago一般现在时经常性发生的动作或存在状态主语为“三单”，动词加s/es；非“三单”，动词用原形频度副词：sometimes, usually, often, always, never, seldomevery day现在进行时现在正在发生的动作be + v.ingListen, look, now, at+具体时间点一般将来时将来发生的动作或存在的状态be going to/will 动词原形将来的时间词：tomorrow, the da
2、y after tomorrow, next+一段时间小学英语四大时态各时态句式1、含有be动词的句子：否定句：在be动词后加not He is not a teacher. (is not=isnt) You were not at home yesterday. (were not=werent) I am not doing my homework. She is not going to swim tomorrow.一般疑问句：把be动词提到主语前面，句号变问号 Is he a teacher?Were you at home yesterday?Are you doing your
3、homework?Is she going to swim tomorrow?(含有情态动词的句子，将情态动词看成be动词，一样方式进行变换)2、含有实义动词的句子否定句：请助动词do, 在do后加not，句中实义动词用原形 注意：dodoes, did, dont- doesnt, didnt I do not like him. (do not = dont) He doesnt like apples. You didnt like him.一般疑问句：在请助动词do, 将do提到主语前面，句中实义动词用原形 Do you like me? Does he like apples? Did you go to school yesterday?3、特殊疑问句，助动词和be动词都要放在特殊疑问词后、主语之前 What do you usually do on Sunday? What are you doing here? Where are you going to visit on holiday?