大学英语四级语法大全目录
不定式可放在be动词后面，形成表语。例如：
My work is to clean the room every day.
His dream is to be a doctor.
From:https://www.zgghmh.com/CET-4/20000997.asp
大学英语四级语法大全目录
不定式可放在be动词后面，形成表语。例如：
My work is to clean the room every day.
His dream is to be a doctor.