could yawp
Verbe régulier : yawp - yawped- yawped

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could yawp
you could yawp
she could yawp
we could yawp
you could yawp
they could yawp 	I could be yawping
you could be yawping
she could be yawping
we could be yawping
you could be yawping
they could be yawping	I could have yawped
you could have yawped
she could have yawped
we could have yawped
you could have yawped
they could have yawped	I could have been yawping
you could have been yawping
she could have been yawping
we could have been yawping
you could have been yawping
they could have been yawping	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I couldn't yawp
you couldn't yawp
she couldn't yawp
we couldn't yawp
you couldn't yawp
they couldn't yawp 	I couldn't be yawping
you couldn't be yawping
she couldn't be yawping
we couldn't be yawping
you couldn't be yawping
they couldn't be yawping	I couldn't have yawped
you couldn't have yawped
she couldn't have yawped
we couldn't have yawped
you couldn't have yawped
they couldn't have yawped	I couldn't have been yawping
you couldn't have been yawping
she couldn't have been yawping
we couldn't have been yawping
you couldn't have been yawping
they couldn't have been yawping	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I yawp?
could you yawp?
could she yawp?
could we yawp?
could you yawp?
could they yawp? 	could I be yawping?
could you be yawping?
could she be yawping?
could we be yawping?
could you be yawping?
could they be yawping? 	could I have yawped?
could you have yawped?
could she have yawped?
could we have yawped?
could you have yawped?
could they have yawped? 	could I have been yawping?
could you have been yawping?
could she have been yawping?
could we have been yawping?
could you have been yawping?
could they have been yawping? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
couldn't I yawp?
couldn't you yawp?
couldn't she yawp?
couldn't we yawp?
couldn't you yawp?
couldn't they yawp? 	couldn't I be yawping?
couldn't you be yawping?
couldn't she be yawping?
couldn't we be yawping?
couldn't you be yawping?
couldn't they be yawping? 	couldn't I have yawped?
couldn't you have yawped?
couldn't she have yawped?
couldn't we have yawped?
couldn't you have yawped?
couldn't they have yawped? 	couldn't I have been yawping?
couldn't you have been yawping?
couldn't she have been yawping?
couldn't we have been yawping?
couldn't you have been yawping?
couldn't they have been yawping?