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 must not snorkel you must not snorkel he must not snorkel we must not snorkel you must not snorkel they must not snorkel	I must not be snorkeling you must not be snorkeling he must not be snorkeling we must not be snorkeling you must not be snorkeling they must not be snorkeling
Perfect	V-ing perfect
I must not have snorkeled you must not have snorkeled he must not have snorkeled we must not have snorkeled you must not have snorkeled they must not have snorkeled	I must not have been snorkeling you must not have been snorkeling he must not have been snorkeling we must not have been snorkeling you must not have been snorkeling they must not 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
must I not snorkel? must you not snorkel? must he not snorkel? must we not snorkel? must you not snorkel? must they not snorkel?	must I not be snorkeling? must you not be snorkeling? must he not be snorkeling? must we not be snorkeling? must you not be snorkeling? must they not be snorkeling?
Perfect	V-ing perfect
must I not have snorkeled? must you not have snorkeled? must he not have snorkeled? must we not have snorkeled? must you not have snorkeled? must they not have snorkeled?	must I not have been snorkeling? must you not have been snorkeling? must he not have been snorkeling? must we not have been snorkeling? must you not have been snorkeling? must they not have been snorkeling?