English verb conjugation
MUST SEEM

Regular verb: seem - seemed - seemed

Affirmation

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

Negation

Simple form	V-ing form
- - it must not seem - - -	- - it must not be seeming - - -
Perfect	V-ing perfect
- - it must not have seemed - - -	- - it must not have been seeming - - -

Interrogative form

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

Interro-negative form

Simple form	V-ing form
- - must it not seem? - - -	- - must it not be seeming? - - -
Perfect	V-ing perfect
- - must it not have seemed? - - -	- - must it not have been seeming? - - -