English verb conjugation
MUST SQUABBLE

Regular verb: squabble - squabbled - squabbled

Affirmation

Simple form	V-ing form
I must squabble you must squabble she must squabble we must squabble you must squabble they must squabble	I must be squabbling you must be squabbling she 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 she 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 she 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 mustn't squabble you mustn't squabble she mustn't squabble we mustn't squabble you mustn't squabble they mustn't squabble	I mustn't be squabbling you mustn't be squabbling she mustn't be squabbling we mustn't be squabbling you mustn't be squabbling they mustn't be squabbling
Perfect	V-ing perfect
I mustn't have squabbled you mustn't have squabbled she mustn't have squabbled we mustn't have squabbled you mustn't have squabbled they mustn't have squabbled	I mustn't have been squabbling you mustn't have been squabbling she mustn't have been squabbling we mustn't have been squabbling you mustn't have been squabbling they mustn't have been squabbling

Interrogative form

Simple form	V-ing form
must I squabble? must you squabble? must she squabble? must we squabble? must you squabble? must they squabble?	must I be squabbling? must you be squabbling? must she 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 she 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 she 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
mustn't I squabble? mustn't you squabble? mustn't she squabble? mustn't we squabble? mustn't you squabble? mustn't they squabble?	mustn't I be squabbling? mustn't you be squabbling? mustn't she be squabbling? mustn't we be squabbling? mustn't you be squabbling? mustn't they be squabbling?
Perfect	V-ing perfect
mustn't I have squabbled? mustn't you have squabbled? mustn't she have squabbled? mustn't we have squabbled? mustn't you have squabbled? mustn't they have squabbled?	mustn't I have been squabbling? mustn't you have been squabbling? mustn't she have been squabbling? mustn't we have been squabbling? mustn't you have been squabbling? mustn't they have been squabbling?