could corrugate
Verbe régulier : corrugate - corrugated- corrugated

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could corrugate
you could corrugate
she could corrugate
we could corrugate
you could corrugate
they could corrugate 	I could be corrugating
you could be corrugating
she could be corrugating
we could be corrugating
you could be corrugating
they could be corrugating	I could have corrugated
you could have corrugated
she could have corrugated
we could have corrugated
you could have corrugated
they could have corrugated	I could have been corrugating
you could have been corrugating
she could have been corrugating
we could have been corrugating
you could have been corrugating
they could have been corrugating	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I couldn't corrugate
you couldn't corrugate
she couldn't corrugate
we couldn't corrugate
you couldn't corrugate
they couldn't corrugate 	I couldn't be corrugating
you couldn't be corrugating
she couldn't be corrugating
we couldn't be corrugating
you couldn't be corrugating
they couldn't be corrugating	I couldn't have corrugated
you couldn't have corrugated
she couldn't have corrugated
we couldn't have corrugated
you couldn't have corrugated
they couldn't have corrugated	I couldn't have been corrugating
you couldn't have been corrugating
she couldn't have been corrugating
we couldn't have been corrugating
you couldn't have been corrugating
they couldn't have been corrugating	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I corrugate?
could you corrugate?
could she corrugate?
could we corrugate?
could you corrugate?
could they corrugate? 	could I be corrugating?
could you be corrugating?
could she be corrugating?
could we be corrugating?
could you be corrugating?
could they be corrugating? 	could I have corrugated?
could you have corrugated?
could she have corrugated?
could we have corrugated?
could you have corrugated?
could they have corrugated? 	could I have been corrugating?
could you have been corrugating?
could she have been corrugating?
could we have been corrugating?
could you have been corrugating?
could they have been corrugating? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
couldn't I corrugate?
couldn't you corrugate?
couldn't she corrugate?
couldn't we corrugate?
couldn't you corrugate?
couldn't they corrugate? 	couldn't I be corrugating?
couldn't you be corrugating?
couldn't she be corrugating?
couldn't we be corrugating?
couldn't you be corrugating?
couldn't they be corrugating? 	couldn't I have corrugated?
couldn't you have corrugated?
couldn't she have corrugated?
couldn't we have corrugated?
couldn't you have corrugated?
couldn't they have corrugated? 	couldn't I have been corrugating?
couldn't you have been corrugating?
couldn't she have been corrugating?
couldn't we have been corrugating?
couldn't you have been corrugating?
couldn't they have been corrugating?