English verb conjugation
MUST SOW

Irregular verb: sow - sowed - sown, sowed

Affirmation

Simple form	V-ing form
I must sow you must sow he must sow we must sow you must sow they must sow	I must be sowing you must be sowing he must be sowing we must be sowing you must be sowing they must be sowing
Perfect	V-ing perfect
I must have sown, sowed you must have sown, sowed he must have sown, sowed we must have sown, sowed you must have sown, sowed they must have sown, sowed	I must have been sowing you must have been sowing he must have been sowing we must have been sowing you must have been sowing they must have been sowing

Negation

Simple form	V-ing form
I mustn't sow you mustn't sow he mustn't sow we mustn't sow you mustn't sow they mustn't sow	I mustn't be sowing you mustn't be sowing he mustn't be sowing we mustn't be sowing you mustn't be sowing they mustn't be sowing
Perfect	V-ing perfect
I mustn't have sown, sowed you mustn't have sown, sowed he mustn't have sown, sowed we mustn't have sown, sowed you mustn't have sown, sowed they mustn't have sown, sowed	I mustn't have been sowing you mustn't have been sowing he mustn't have been sowing we mustn't have been sowing you mustn't have been sowing they mustn't have been sowing

Interrogative form

Simple form	V-ing form
must I sow? must you sow? must he sow? must we sow? must you sow? must they sow?	must I be sowing? must you be sowing? must he be sowing? must we be sowing? must you be sowing? must they be sowing?
Perfect	V-ing perfect
must I have sown, sowed? must you have sown, sowed? must he have sown, sowed? must we have sown, sowed? must you have sown, sowed? must they have sown, sowed?	must I have been sowing? must you have been sowing? must he have been sowing? must we have been sowing? must you have been sowing? must they have been sowing?

Interro-negative form

Simple form	V-ing form
mustn't I sow? mustn't you sow? mustn't he sow? mustn't we sow? mustn't you sow? mustn't they sow?	mustn't I be sowing? mustn't you be sowing? mustn't he be sowing? mustn't we be sowing? mustn't you be sowing? mustn't they be sowing?
Perfect	V-ing perfect
mustn't I have sown, sowed? mustn't you have sown, sowed? mustn't he have sown, sowed? mustn't we have sown, sowed? mustn't you have sown, sowed? mustn't they have sown, sowed?	mustn't I have been sowing? mustn't you have been sowing? mustn't he have been sowing? mustn't we have been sowing? mustn't you have been sowing? mustn't they have been sowing?