English verb conjugation
MUST SCUMBLE

Regular verb: scumble - scumbled - scumbled

Affirmation

Simple form	V-ing form
I must scumble you must scumble he must scumble we must scumble you must scumble they must scumble	I must be scumbling you must be scumbling he must be scumbling we must be scumbling you must be scumbling they must be scumbling
Perfect	V-ing perfect
I must have scumbled you must have scumbled he must have scumbled we must have scumbled you must have scumbled they must have scumbled	I must have been scumbling you must have been scumbling he must have been scumbling we must have been scumbling you must have been scumbling they must have been scumbling

Negation

Simple form	V-ing form
I must not scumble you must not scumble he must not scumble we must not scumble you must not scumble they must not scumble	I must not be scumbling you must not be scumbling he must not be scumbling we must not be scumbling you must not be scumbling they must not be scumbling
Perfect	V-ing perfect
I must not have scumbled you must not have scumbled he must not have scumbled we must not have scumbled you must not have scumbled they must not have scumbled	I must not have been scumbling you must not have been scumbling he must not have been scumbling we must not have been scumbling you must not have been scumbling they must not have been scumbling

Interrogative form

Simple form	V-ing form
must I scumble? must you scumble? must he scumble? must we scumble? must you scumble? must they scumble?	must I be scumbling? must you be scumbling? must he be scumbling? must we be scumbling? must you be scumbling? must they be scumbling?
Perfect	V-ing perfect
must I have scumbled? must you have scumbled? must he have scumbled? must we have scumbled? must you have scumbled? must they have scumbled?	must I have been scumbling? must you have been scumbling? must he have been scumbling? must we have been scumbling? must you have been scumbling? must they have been scumbling?

Interro-negative form

Simple form	V-ing form
must I not scumble? must you not scumble? must he not scumble? must we not scumble? must you not scumble? must they not scumble?	must I not be scumbling? must you not be scumbling? must he not be scumbling? must we not be scumbling? must you not be scumbling? must they not be scumbling?
Perfect	V-ing perfect
must I not have scumbled? must you not have scumbled? must he not have scumbled? must we not have scumbled? must you not have scumbled? must they not have scumbled?	must I not have been scumbling? must you not have been scumbling? must he not have been scumbling? must we not have been scumbling? must you not have been scumbling? must they not have been scumbling?