English verb conjugation
MUST SCOWL

Regular verb: scowl - scowled - scowled

Affirmation

Simple form	V-ing form
I must scowl you must scowl he must scowl we must scowl you must scowl they must scowl	I must be scowling you must be scowling he must be scowling we must be scowling you must be scowling they must be scowling
Perfect	V-ing perfect
I must have scowled you must have scowled he must have scowled we must have scowled you must have scowled they must have scowled	I must have been scowling you must have been scowling he must have been scowling we must have been scowling you must have been scowling they must have been scowling

Negation

Simple form	V-ing form
I must not scowl you must not scowl he must not scowl we must not scowl you must not scowl they must not scowl	I must not be scowling you must not be scowling he must not be scowling we must not be scowling you must not be scowling they must not be scowling
Perfect	V-ing perfect
I must not have scowled you must not have scowled he must not have scowled we must not have scowled you must not have scowled they must not have scowled	I must not have been scowling you must not have been scowling he must not have been scowling we must not have been scowling you must not have been scowling they must not have been scowling

Interrogative form

Simple form	V-ing form
must I scowl? must you scowl? must he scowl? must we scowl? must you scowl? must they scowl?	must I be scowling? must you be scowling? must he be scowling? must we be scowling? must you be scowling? must they be scowling?
Perfect	V-ing perfect
must I have scowled? must you have scowled? must he have scowled? must we have scowled? must you have scowled? must they have scowled?	must I have been scowling? must you have been scowling? must he have been scowling? must we have been scowling? must you have been scowling? must they have been scowling?

Interro-negative form

Simple form	V-ing form
must I not scowl? must you not scowl? must he not scowl? must we not scowl? must you not scowl? must they not scowl?	must I not be scowling? must you not be scowling? must he not be scowling? must we not be scowling? must you not be scowling? must they not be scowling?
Perfect	V-ing perfect
must I not have scowled? must you not have scowled? must he not have scowled? must we not have scowled? must you not have scowled? must they not have scowled?	must I not have been scowling? must you not have been scowling? must he not have been scowling? must we not have been scowling? must you not have been scowling? must they not have been scowling?