English verb conjugation
MUST COSH

Regular verb: cosh - coshed - coshed

Affirmation

Simple form	V-ing form
I must cosh you must cosh he must cosh we must cosh you must cosh they must cosh	I must be coshing you must be coshing he must be coshing we must be coshing you must be coshing they must be coshing
Perfect	V-ing perfect
I must have coshed you must have coshed he must have coshed we must have coshed you must have coshed they must have coshed	I must have been coshing you must have been coshing he must have been coshing we must have been coshing you must have been coshing they must have been coshing

Negation

Simple form	V-ing form
I mustn't cosh you mustn't cosh he mustn't cosh we mustn't cosh you mustn't cosh they mustn't cosh	I mustn't be coshing you mustn't be coshing he mustn't be coshing we mustn't be coshing you mustn't be coshing they mustn't be coshing
Perfect	V-ing perfect
I mustn't have coshed you mustn't have coshed he mustn't have coshed we mustn't have coshed you mustn't have coshed they mustn't have coshed	I mustn't have been coshing you mustn't have been coshing he mustn't have been coshing we mustn't have been coshing you mustn't have been coshing they mustn't have been coshing

Interrogative form

Simple form	V-ing form
must I cosh? must you cosh? must he cosh? must we cosh? must you cosh? must they cosh?	must I be coshing? must you be coshing? must he be coshing? must we be coshing? must you be coshing? must they be coshing?
Perfect	V-ing perfect
must I have coshed? must you have coshed? must he have coshed? must we have coshed? must you have coshed? must they have coshed?	must I have been coshing? must you have been coshing? must he have been coshing? must we have been coshing? must you have been coshing? must they have been coshing?

Interro-negative form

Simple form	V-ing form
mustn't I cosh? mustn't you cosh? mustn't he cosh? mustn't we cosh? mustn't you cosh? mustn't they cosh?	mustn't I be coshing? mustn't you be coshing? mustn't he be coshing? mustn't we be coshing? mustn't you be coshing? mustn't they be coshing?
Perfect	V-ing perfect
mustn't I have coshed? mustn't you have coshed? mustn't he have coshed? mustn't we have coshed? mustn't you have coshed? mustn't they have coshed?	mustn't I have been coshing? mustn't you have been coshing? mustn't he have been coshing? mustn't we have been coshing? mustn't you have been coshing? mustn't they have been coshing?