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