English verb conjugation
MUST SQUABBLE

Regular verb: squabble - squabbled - squabbled

Affirmation

Simple form	V-ing form
I must squabble you must squabble he must squabble we must squabble you must squabble they must squabble	I must be squabbling you must be squabbling he must be squabbling we must be squabbling you must be squabbling they must be squabbling
Perfect	V-ing perfect
I must have squabbled you must have squabbled he must have squabbled we must have squabbled you must have squabbled they must have squabbled	I must have been squabbling you must have been squabbling he must have been squabbling we must have been squabbling you must have been squabbling they must have been squabbling

Negation

Simple form	V-ing form
I must not squabble you must not squabble he must not squabble we must not squabble you must not squabble they must not squabble	I must not be squabbling you must not be squabbling he must not be squabbling we must not be squabbling you must not be squabbling they must not be squabbling
Perfect	V-ing perfect
I must not have squabbled you must not have squabbled he must not have squabbled we must not have squabbled you must not have squabbled they must not have squabbled	I must not have been squabbling you must not have been squabbling he must not have been squabbling we must not have been squabbling you must not have been squabbling they must not have been squabbling

Interrogative form

Simple form	V-ing form
must I squabble? must you squabble? must he squabble? must we squabble? must you squabble? must they squabble?	must I be squabbling? must you be squabbling? must he be squabbling? must we be squabbling? must you be squabbling? must they be squabbling?
Perfect	V-ing perfect
must I have squabbled? must you have squabbled? must he have squabbled? must we have squabbled? must you have squabbled? must they have squabbled?	must I have been squabbling? must you have been squabbling? must he have been squabbling? must we have been squabbling? must you have been squabbling? must they have been squabbling?

Interro-negative form

Simple form	V-ing form
must I not squabble? must you not squabble? must he not squabble? must we not squabble? must you not squabble? must they not squabble?	must I not be squabbling? must you not be squabbling? must he not be squabbling? must we not be squabbling? must you not be squabbling? must they not be squabbling?
Perfect	V-ing perfect
must I not have squabbled? must you not have squabbled? must he not have squabbled? must we not have squabbled? must you not have squabbled? must they not have squabbled?	must I not have been squabbling? must you not have been squabbling? must he not have been squabbling? must we not have been squabbling? must you not have been squabbling? must they not have been squabbling?