名词加that 是that引导的定语从句。that 可以代替人。如the man that is speaking at meeting is a famous scientist.在会上讲话的那个人是一位著名科学家 Is this the teacher that you talked about ； yesterday? that 可以代替物，如，Is this photo that you took last summer?
名词加that是什么从句
当名词后跟that 从句(即名词+that从句)时，这个that从句可以是定语从句、同位语从句、结果状语从句、主语从句。例如：
1、I'；ll never forget the day that we met (定语从句)
2、We shed tears with excitement at the news that our class had won the match. ( 同位语从句)
3、It rocked the world that China launched a man-made satellite that year. ( 主语从句)
3、He is so young a boy that he can'；t go to school. (结果状语从句)
