English verb conjugation
COULD SEEM

Regular verb: seem - seemed - seemed

Affirmation

Simple form	V-ing form
- - it could seem - - -	- - it could be seeming - - -
Perfect	V-ing perfect
- - it could have seemed - - -	- - it could have been seeming - - -

Negation

Simple form	V-ing form
- - it couldn't seem - - -	- - it couldn't be seeming - - -
Perfect	V-ing perfect
- - it couldn't have seemed - - -	- - it couldn't have been seeming - - -

Interrogative form

Simple form	V-ing form
- - could it seem? - - -	- - could it be seeming? - - -
Perfect	V-ing perfect
- - could it have seemed? - - -	- - could it have been seeming? - - -

Interro-negative form

Simple form	V-ing form
- - couldn't it seem? - - -	- - couldn't it be seeming? - - -
Perfect	V-ing perfect
- - couldn't it have seemed? - - -	- - couldn't it have been seeming? - - -