同学你好，该知识点来自沪江网校《英语零基础直达CET4级考试版》的课程，想要更系统的学习，欢迎进入课程学习。不仅可以和更多的同学一起学习，而且还有老师、助教随时的学习指导和知识点解答哦。

同学， 你好~

注意课件内老师说的是从句的变化哦，按照同学要求，举例如下：
现在时 → 过去时
1.I wish to be a teacher.he said. 他说：“我想当老师。”
→He said that he wished to be a teacher. 他说他想当老师。（一般现在时 → 一般过去时）
2. Li Ming said,I am a student.李明说：“我是个学生”。
→Li Ming said that he was a student.李明说他是个学生。（一般现在时 → 一般过去时）
3.  He said,I can lend it to you. 他说：“我可以把它借给你。”
→He said that he could lend it to you. 他说他可以把它借给你。（若直接引语中有情态动词can, may等，也应变成过去式could, might等）
4.She said,He's lying. 她说：“他在说谎。”
→She said that he was lying. 她说他在说谎。（现在进行时 →过去进行时）

现在完成时 → 过去完成时
1. She said,I have lost a pen. 她说：“我丢了一支钢笔。”
→She said she had lost a pen.她说她丢了一支钢笔。
2. Jenny said,I have lost a book.珍妮说：“我丢了一本书。
→Jenny said she had lost a book.珍妮说她丢了一本书。

祝同学学习愉快~