English verb conjugation
MUST WATER

Regular verb: water - watered - watered

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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
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
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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?