must water
Regular verb: water - watered- watered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must water
you must water
he must water
we must water
you must water
they must water 	I must be watering
you must be watering
he must be watering
we must be watering
you must be watering
they must be watering	I must have watered
you must have watered
he must have watered
we must have watered
you must have watered
they must have watered	I must have been watering
you must have been watering
he must have been watering
we must have been watering
you must have been watering
they must have been watering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't water
you mustn't water
he mustn't water
we mustn't water
you mustn't water
they mustn't water 	I mustn't be watering
you mustn't be watering
he mustn't be watering
we mustn't be watering
you mustn't be watering
they mustn't be watering	I mustn't have watered
you mustn't have watered
he mustn't have watered
we mustn't have watered
you mustn't have watered
they mustn't have watered	I mustn't have been watering
you mustn't have been watering
he mustn't have been watering
we mustn't have been watering
you mustn't have been watering
they mustn't have been watering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I water?
must you water?
must he water?
must we water?
must you water?
must they water? 	must I be watering?
must you be watering?
must he be watering?
must we be watering?
must you be watering?
must they be watering? 	must I have watered?
must you have watered?
must he have watered?
must we have watered?
must you have watered?
must they have watered? 	must I have been watering?
must you have been watering?
must he have been watering?
must we have been watering?
must you have been watering?
must they have been watering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I water?
mustn't you water?
mustn't he water?
mustn't we water?
mustn't you water?
mustn't they water? 	mustn't I be watering?
mustn't you be watering?
mustn't he be watering?
mustn't we be watering?
mustn't you be watering?
mustn't they be watering? 	mustn't I have watered?
mustn't you have watered?
mustn't he have watered?
mustn't we have watered?
mustn't you have watered?
mustn't they have watered? 	mustn't I have been watering?
mustn't you have been watering?
mustn't he have been watering?
mustn't we have been watering?
mustn't you have been watering?
mustn't they have been watering?