一直以来，英语是很多人想要去学习但是就是学不动的一门学科，包括的高中生以及大学生。事实上，要想学好英语其实并不难，首先要背诵精彩的英文句型，只要把句型基础打好了，阅读理解学起来就会不少。下面，小编就给考生们整理了高一的英语语法知识点总结，希望对大家有所帮助。

　　高一英语语法知识点总结(二)：如何变时态

　　直接引语在改为间接引语时、时态需要做相应的调整。

　　现在时它需改为过去时态;过去时态改为完成时;过去完成时则保留原来的时态。如：

　　1)She said. "I have lost a pen."→She said she had lost a pen

　　2)She said. "We hope so."→She said they hoped so.

　　3) She said. "He will go to see his friend。"→She said he would go to see his friend。

　　但要注意在以下几种情况下。在直接引语变为间接引语时，时态一般不变化。

　　①直接引语是客观真理。

　　"The earth moves around the sun and the moon moves around the earth, the teacher told me. → The teacher told me the earth moves around the sun and the moon moves around the earth。

　　②直接引语是过去进行时，时态不变。如：

　　Jack said. "John, where were you going when I met you in the street?"→Jack asked John where he was going when he met him in the street。

　　③直接引语中有具体的过去某年、某月、某日作状语，变为间接引语时，时态不变。如：

　　Xiao Wang said. "I was born on April 2l, 1980。" →Xiao Wang said he was born on April 20, 1980。

　　④直接引语如果是一般现在时。表示一种反复出现或习惯性的动作，变间接引语，时态不变。如：

　　He said, "I get up at six every morning。" →He said he gets up at six every morning。

　　⑤如果直接引语中的情态动词没有过去时的形式(例：ought to， had better, used to)和已经是过去时的形式时，(例：could, should, would, might)不再变。如：

　　Peter said. "You had better come have today。" →Peter said I had better go there that day。