句 式一．考点精讲1. 陈述句肯定形式变否定形式类别方法示例谓语动词为 be 动词(am, is, are, was, were)在 be 动词后直接+ notHe is a student. →He isn’t a student.He was a teacher before. →He wasn’t a teacher before.谓语动词含有情态动词(can, will, must, should…)在情态动词后直接+ notHe can play football well. →He can’t play football well.谓语动词为实义动词，且没有情态动词、助动词在谓语动词(务必用动词原形)前+ don’t (原形用)；doesn’t (三单用)；didn’t (过去时用)I like apples. →I don’t like apples.He likes apples. →He doesn’t like apples.I liked apples before. →I didn’t like apples before.Tips: not 与其他词连在一起时，一般写为缩略形式，但 am not 不缩写。常见缩略形式如下：is not = isn’t are not = aren’t was not = wasn’t were not = weren’t do not = don’t does not = doesn’t did not = didn’t have not = haven’thas not = hasn’t should not = shouldn’t must not = mustn’t need not = needn’tcan not = can’t will not = won’t2. 陈述句变一般疑问句类别方法示例谓语动词为 be 动词(am, is, are, was, were)第一步：把 be 动词放在句首 ( I am/We are 改 为 Are you; I was/We He is kind. →Is he kind ?I am a student. →were 改为 Were you)第二步：句号改问号Are you a student ?Mike was thin before. →Was Mike thin before ?谓语动词含有情态动词(can, will, must, should…)第一步：把情态动词放在句首第二步：句号改问号(注意人称的变换)I can sing. →Can you sing ?I’d like some tomatoes. →Would you like some tomatoes ?谓语动词为实义动词，且没有情态动词、助动词第一步：在句首加 Do/Does/Did,后用动词原形第二步：句号改问号(注意人称的变换)I go to school on foot. →Do you go to school on foot ?He goes to school on foot. →Does he go to school on foot ?I went to school on foot. →Did you go to school on foot ?Tips: 在一般疑问句时，注意人称的变换 I,we 改为 you; my,...
