English verb conjugation
MUST FLOUNDER

Regular verb: flounder - floundered - floundered

Affirmation

Simple form	V-ing form
I must flounder you must flounder he must flounder we must flounder you must flounder they must flounder	I must be floundering you must be floundering he must be floundering we must be floundering you must be floundering they must be floundering
Perfect	V-ing perfect
I must have floundered you must have floundered he must have floundered we must have floundered you must have floundered they must have floundered	I must have been floundering you must have been floundering he must have been floundering we must have been floundering you must have been floundering they must have been floundering

Negation

Simple form	V-ing form
I mustn't flounder you mustn't flounder he mustn't flounder we mustn't flounder you mustn't flounder they mustn't flounder	I mustn't be floundering you mustn't be floundering he mustn't be floundering we mustn't be floundering you mustn't be floundering they mustn't be floundering
Perfect	V-ing perfect
I mustn't have floundered you mustn't have floundered he mustn't have floundered we mustn't have floundered you mustn't have floundered they mustn't have floundered	I mustn't have been floundering you mustn't have been floundering he mustn't have been floundering we mustn't have been floundering you mustn't have been floundering they mustn't have been floundering

Interrogative form

Simple form	V-ing form
must I flounder? must you flounder? must he flounder? must we flounder? must you flounder? must they flounder?	must I be floundering? must you be floundering? must he be floundering? must we be floundering? must you be floundering? must they be floundering?
Perfect	V-ing perfect
must I have floundered? must you have floundered? must he have floundered? must we have floundered? must you have floundered? must they have floundered?	must I have been floundering? must you have been floundering? must he have been floundering? must we have been floundering? must you have been floundering? must they have been floundering?

Interro-negative form

Simple form	V-ing form
mustn't I flounder? mustn't you flounder? mustn't he flounder? mustn't we flounder? mustn't you flounder? mustn't they flounder?	mustn't I be floundering? mustn't you be floundering? mustn't he be floundering? mustn't we be floundering? mustn't you be floundering? mustn't they be floundering?
Perfect	V-ing perfect
mustn't I have floundered? mustn't you have floundered? mustn't he have floundered? mustn't we have floundered? mustn't you have floundered? mustn't they have floundered?	mustn't I have been floundering? mustn't you have been floundering? mustn't he have been floundering? mustn't we have been floundering? mustn't you have been floundering? mustn't they have been floundering?