English verb conjugation
COULD SNORKEL

Regular verb: snorkel - snorkeled - snorkeled

Affirmation

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

Negation

Simple form	V-ing form
I could not snorkel you could not snorkel he could not snorkel we could not snorkel you could not snorkel they could not snorkel	I could not be snorkeling you could not be snorkeling he could not be snorkeling we could not be snorkeling you could not be snorkeling they could not be snorkeling
Perfect	V-ing perfect
I could not have snorkeled you could not have snorkeled he could not have snorkeled we could not have snorkeled you could not have snorkeled they could not have snorkeled	I could not have been snorkeling you could not have been snorkeling he could not have been snorkeling we could not have been snorkeling you could not have been snorkeling they could not have been snorkeling

Interrogative form

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

Interro-negative form

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