"imagine"后面可以接以下几种结构：
宾语从句
可以接由"that"或"what"引导的宾语从句，例如：
She imagined that she would travel around the world.
I can't imagine what he looks like.
动词ing形式
表示想象正在做某事，例如：
I can imagine her singing a beautiful song.
They were imagining themselves on a beach.
不定式形式
表示想象去做某事，例如：
Can you imagine to travel to space？
I can't imagine to live without technology.
接名词、代词、动名词
作为及物动词，"imagine"后面可以跟名词、代词、动名词作为宾语，例如：
She imagined a peaceful life.
They imagined their future together.
根据具体的语境和需要表达的意图，可以选择合适的结构来搭配"imagine"。