this is an old man. he is 80 years old. 合成一句

问题描述:

this is an old man. he is 80 years old. 合成一句

This is an 80-year-old man.

he is an old an man who is 80 years old

This is an old man who is 80 years old.

This is an eighty-year-old man. This is a man who is eighty years old.

this is an old man who is 80 years

若改成定语从句:This is an old man who is 80 years old./ 简单句: This old man is 80 years old.