四大时态讲解（素材）通用版小学英语

一般现在时 一、定义：表示目前的状态或经常性的动作。 Jerry is a big guy. He eats three bowls of meat every day. 二、结构 1.“主系表”结构： e g: You are a student You are not a student. Are you a student ? Yes, I am. No, I am not = amn’t. 肯：主 + be(am, is, are) + 表。 否：主+be(am, is, are)+not+表。They are not teachers? 疑：Be+主+表? Are they teachers？ 肯定回答: Yes, 主+be. Yes,they are.No，they are not. 否定回答: No, 主+be not. (可缩写) am not is not=isn’t are not=aren’t 2.“主+谓+宾”结构 肯：主（三单）+谓+s +宾 否：主（三单）+don’t/doesn’t +v.原+宾。 疑：Do/Does +主 +v.原形+宾? 肯定回答： Yes, 主+do/ does. 否定回答： No, 主+ don’t/doesn’t. 例如：He likes English. Lily likes cats. (变否) He doesn’t like English. Lily doesn’t like cats. Does Lily like cats? (变疑) Does he like English? Yes, he does./ No, he doesn’t. Yes,she does. 3. 特殊疑问句 1 结构：特词+助v.+主+谓v原+其它？ He does his homework every day. (变否、变疑、并对划线部分提问) 特疑：What does he do every day? 解析：否定句中的doesn’t 为助动词，第二个do 为实义动词。 He brushes his teeth three times a day. 对three times 提问：（即对次数提问）How many times does he br