Question

I don’t believe in ghosts.

Answer 1

主：I

谓：think

宾语（从句）：people only imagine that they see them.

是一个that引导的宾语从句,that省略掉了.

imagine在这儿是及物的,在从句中作谓语,又由that引导一个一个宾语从句.

例子啊……

这句好啦：

i can't imagine the life without you.

及物.