English verb conjugation
MUST SNORKEL

Regular verb: snorkel - snorkeled - snorkeled

Affirmation

Simple form	V-ing form
I must snorkel you must snorkel he must snorkel we must snorkel you must snorkel they must snorkel	I must be snorkeling you must be snorkeling he must be snorkeling we must be snorkeling you must be snorkeling they must be snorkeling
Perfect	V-ing perfect
I must have snorkeled you must have snorkeled he must have snorkeled we must have snorkeled you must have snorkeled they must have snorkeled	I must have been snorkeling you must have been snorkeling he must have been snorkeling we must have been snorkeling you must have been snorkeling they must have been snorkeling

Negation

Simple form	V-ing form
I mustn't snorkel you mustn't snorkel he mustn't snorkel we mustn't snorkel you mustn't snorkel they mustn't snorkel	I mustn't be snorkeling you mustn't be snorkeling he mustn't be snorkeling we mustn't be snorkeling you mustn't be snorkeling they mustn't be snorkeling
Perfect	V-ing perfect
I mustn't have snorkeled you mustn't have snorkeled he mustn't have snorkeled we mustn't have snorkeled you mustn't have snorkeled they mustn't have snorkeled	I mustn't have been snorkeling you mustn't have been snorkeling he mustn't have been snorkeling we mustn't have been snorkeling you mustn't have been snorkeling they mustn't have been snorkeling

Interrogative form

Simple form	V-ing form
must I snorkel? must you snorkel? must he snorkel? must we snorkel? must you snorkel? must they snorkel?	must I be snorkeling? must you be snorkeling? must he be snorkeling? must we be snorkeling? must you be snorkeling? must they be snorkeling?
Perfect	V-ing perfect
must I have snorkeled? must you have snorkeled? must he have snorkeled? must we have snorkeled? must you have snorkeled? must they have snorkeled?	must I have been snorkeling? must you have been snorkeling? must he have been snorkeling? must we have been snorkeling? must you have been snorkeling? must they have been snorkeling?

Interro-negative form

Simple form	V-ing form
mustn't I snorkel? mustn't you snorkel? mustn't he snorkel? mustn't we snorkel? mustn't you snorkel? mustn't they snorkel?	mustn't I be snorkeling? mustn't you be snorkeling? mustn't he be snorkeling? mustn't we be snorkeling? mustn't you be snorkeling? mustn't they be snorkeling?
Perfect	V-ing perfect
mustn't I have snorkeled? mustn't you have snorkeled? mustn't he have snorkeled? mustn't we have snorkeled? mustn't you have snorkeled? mustn't they have snorkeled?	mustn't I have been snorkeling? mustn't you have been snorkeling? mustn't he have been snorkeling? mustn't we have been snorkeling? mustn't you have been snorkeling? mustn't they have been snorkeling?