could lifeguard
Verbe régulier : lifeguard - lifeguarded- lifeguarded

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
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	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	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
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	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	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
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? 	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? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
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? 	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?