English verb conjugation
MUST STROP

Regular verb: strop - stropped - stropped

Affirmation

Simple form	V-ing form
I must strop you must strop he must strop we must strop you must strop they must strop	I must be stropping you must be stropping he must be stropping we must be stropping you must be stropping they must be stropping
Perfect	V-ing perfect
I must have stropped you must have stropped he must have stropped we must have stropped you must have stropped they must have stropped	I must have been stropping you must have been stropping he must have been stropping we must have been stropping you must have been stropping they must have been stropping

Negation

Simple form	V-ing form
I mustn't strop you mustn't strop he mustn't strop we mustn't strop you mustn't strop they mustn't strop	I mustn't be stropping you mustn't be stropping he mustn't be stropping we mustn't be stropping you mustn't be stropping they mustn't be stropping
Perfect	V-ing perfect
I mustn't have stropped you mustn't have stropped he mustn't have stropped we mustn't have stropped you mustn't have stropped they mustn't have stropped	I mustn't have been stropping you mustn't have been stropping he mustn't have been stropping we mustn't have been stropping you mustn't have been stropping they mustn't have been stropping

Interrogative form

Simple form	V-ing form
must I strop? must you strop? must he strop? must we strop? must you strop? must they strop?	must I be stropping? must you be stropping? must he be stropping? must we be stropping? must you be stropping? must they be stropping?
Perfect	V-ing perfect
must I have stropped? must you have stropped? must he have stropped? must we have stropped? must you have stropped? must they have stropped?	must I have been stropping? must you have been stropping? must he have been stropping? must we have been stropping? must you have been stropping? must they have been stropping?

Interro-negative form

Simple form	V-ing form
mustn't I strop? mustn't you strop? mustn't he strop? mustn't we strop? mustn't you strop? mustn't they strop?	mustn't I be stropping? mustn't you be stropping? mustn't he be stropping? mustn't we be stropping? mustn't you be stropping? mustn't they be stropping?
Perfect	V-ing perfect
mustn't I have stropped? mustn't you have stropped? mustn't he have stropped? mustn't we have stropped? mustn't you have stropped? mustn't they have stropped?	mustn't I have been stropping? mustn't you have been stropping? mustn't he have been stropping? mustn't we have been stropping? mustn't you have been stropping? mustn't they have been stropping?