could boom
Verbe régulier : boom - boomed- boomed
Traduction française : retentir - tonner 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could boom
you could boom
he could boom
we could boom
you could boom
they could boom 	I could be booming
you could be booming
he could be booming
we could be booming
you could be booming
they could be booming	I could have boomed
you could have boomed
he could have boomed
we could have boomed
you could have boomed
they could have boomed	I could have been booming
you could have been booming
he could have been booming
we could have been booming
you could have been booming
they could have been booming	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I couldn't boom
you couldn't boom
he couldn't boom
we couldn't boom
you couldn't boom
they couldn't boom 	I couldn't be booming
you couldn't be booming
he couldn't be booming
we couldn't be booming
you couldn't be booming
they couldn't be booming	I couldn't have boomed
you couldn't have boomed
he couldn't have boomed
we couldn't have boomed
you couldn't have boomed
they couldn't have boomed	I couldn't have been booming
you couldn't have been booming
he couldn't have been booming
we couldn't have been booming
you couldn't have been booming
they couldn't have been booming	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I boom?
could you boom?
could he boom?
could we boom?
could you boom?
could they boom? 	could I be booming?
could you be booming?
could he be booming?
could we be booming?
could you be booming?
could they be booming? 	could I have boomed?
could you have boomed?
could he have boomed?
could we have boomed?
could you have boomed?
could they have boomed? 	could I have been booming?
could you have been booming?
could he have been booming?
could we have been booming?
could you have been booming?
could they have been booming? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
couldn't I boom?
couldn't you boom?
couldn't he boom?
couldn't we boom?
couldn't you boom?
couldn't they boom? 	couldn't I be booming?
couldn't you be booming?
couldn't he be booming?
couldn't we be booming?
couldn't you be booming?
couldn't they be booming? 	couldn't I have boomed?
couldn't you have boomed?
couldn't he have boomed?
couldn't we have boomed?
couldn't you have boomed?
couldn't they have boomed? 	couldn't I have been booming?
couldn't you have been booming?
couldn't he have been booming?
couldn't we have been booming?
couldn't you have been booming?
couldn't they have been booming?