English verb conjugation
MUST WELCH

Regular verb: welch - welched - welched

Affirmation

Simple form	V-ing form
I must welch you must welch he must welch we must welch you must welch they must welch	I must be welching you must be welching he must be welching we must be welching you must be welching they must be welching
Perfect	V-ing perfect
I must have welched you must have welched he must have welched we must have welched you must have welched they must have welched	I must have been welching you must have been welching he must have been welching we must have been welching you must have been welching they must have been welching

Negation

Simple form	V-ing form
I mustn't welch you mustn't welch he mustn't welch we mustn't welch you mustn't welch they mustn't welch	I mustn't be welching you mustn't be welching he mustn't be welching we mustn't be welching you mustn't be welching they mustn't be welching
Perfect	V-ing perfect
I mustn't have welched you mustn't have welched he mustn't have welched we mustn't have welched you mustn't have welched they mustn't have welched	I mustn't have been welching you mustn't have been welching he mustn't have been welching we mustn't have been welching you mustn't have been welching they mustn't have been welching

Interrogative form

Simple form	V-ing form
must I welch? must you welch? must he welch? must we welch? must you welch? must they welch?	must I be welching? must you be welching? must he be welching? must we be welching? must you be welching? must they be welching?
Perfect	V-ing perfect
must I have welched? must you have welched? must he have welched? must we have welched? must you have welched? must they have welched?	must I have been welching? must you have been welching? must he have been welching? must we have been welching? must you have been welching? must they have been welching?

Interro-negative form

Simple form	V-ing form
mustn't I welch? mustn't you welch? mustn't he welch? mustn't we welch? mustn't you welch? mustn't they welch?	mustn't I be welching? mustn't you be welching? mustn't he be welching? mustn't we be welching? mustn't you be welching? mustn't they be welching?
Perfect	V-ing perfect
mustn't I have welched? mustn't you have welched? mustn't he have welched? mustn't we have welched? mustn't you have welched? mustn't they have welched?	mustn't I have been welching? mustn't you have been welching? mustn't he have been welching? mustn't we have been welching? mustn't you have been welching? mustn't they have been welching?