Hi ,

I just wanna now,

What is the verb using after "Could have been"? Is it Past participle ? can we use "ing" form too?

train red 181I just wanna now, I just want to know,

Note above how to write that.

train red 181What is the verb form using used after "Could have been"?

Participle [present (-ing form) or past (-en form)].

The same is true after any form of auxiliary be.

could have been thinking; would have been walking; should have been trying
could have been seen; must have been stolen; will have been known