English verb conjugation
COULD LIFEGUARD

Regular verb: lifeguard - lifeguarded - lifeguarded

Affirmation

Simple form	V-ing form
I could lifeguard you could lifeguard he could lifeguard we could lifeguard you could lifeguard they could lifeguard	I could be lifeguarding you could be lifeguarding he could be lifeguarding we could be lifeguarding you could be lifeguarding they could be lifeguarding
Perfect	V-ing perfect
I could have lifeguarded you could have lifeguarded he could have lifeguarded we could have lifeguarded you could have lifeguarded they could have lifeguarded	I could have been lifeguarding you could have been lifeguarding he could have been lifeguarding we could have been lifeguarding you could have been lifeguarding they could have been lifeguarding

Negation

Simple form	V-ing form
I couldn't lifeguard you couldn't lifeguard he couldn't lifeguard we couldn't lifeguard you couldn't lifeguard they couldn't lifeguard	I couldn't be lifeguarding you couldn't be lifeguarding he couldn't be lifeguarding we couldn't be lifeguarding you couldn't be lifeguarding they couldn't be lifeguarding
Perfect	V-ing perfect
I couldn't have lifeguarded you couldn't have lifeguarded he couldn't have lifeguarded we couldn't have lifeguarded you couldn't have lifeguarded they couldn't have lifeguarded	I couldn't have been lifeguarding you couldn't have been lifeguarding he couldn't have been lifeguarding we couldn't have been lifeguarding you couldn't have been lifeguarding they couldn't have been lifeguarding

Interrogative form

Simple form	V-ing form
could I lifeguard? could you lifeguard? could he lifeguard? could we lifeguard? could you lifeguard? could they lifeguard?	could I be lifeguarding? could you be lifeguarding? could he be lifeguarding? could we be lifeguarding? could you be lifeguarding? could they be lifeguarding?
Perfect	V-ing perfect
could I have lifeguarded? could you have lifeguarded? could he have lifeguarded? could we have lifeguarded? could you have lifeguarded? could they have lifeguarded?	could I have been lifeguarding? could you have been lifeguarding? could he have been lifeguarding? could we have been lifeguarding? could you have been lifeguarding? could they have been lifeguarding?

Interro-negative form

Simple form	V-ing form
couldn't I lifeguard? couldn't you lifeguard? couldn't he lifeguard? couldn't we lifeguard? couldn't you lifeguard? couldn't they lifeguard?	couldn't I be lifeguarding? couldn't you be lifeguarding? couldn't he be lifeguarding? couldn't we be lifeguarding? couldn't you be lifeguarding? couldn't they be lifeguarding?
Perfect	V-ing perfect
couldn't I have lifeguarded? couldn't you have lifeguarded? couldn't he have lifeguarded? couldn't we have lifeguarded? couldn't you have lifeguarded? couldn't they have lifeguarded?	couldn't I have been lifeguarding? couldn't you have been lifeguarding? couldn't he have been lifeguarding? couldn't we have been lifeguarding? couldn't you have been lifeguarding? couldn't they have been lifeguarding?