could explode
Regular verb: explode - exploded- exploded

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could explode
you could explode
he could explode
we could explode
you could explode
they could explode 	I could be exploding
you could be exploding
he could be exploding
we could be exploding
you could be exploding
they could be exploding	I could have exploded
you could have exploded
he could have exploded
we could have exploded
you could have exploded
they could have exploded	I could have been exploding
you could have been exploding
he could have been exploding
we could have been exploding
you could have been exploding
they could have been exploding	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't explode
you couldn't explode
he couldn't explode
we couldn't explode
you couldn't explode
they couldn't explode 	I couldn't be exploding
you couldn't be exploding
he couldn't be exploding
we couldn't be exploding
you couldn't be exploding
they couldn't be exploding	I couldn't have exploded
you couldn't have exploded
he couldn't have exploded
we couldn't have exploded
you couldn't have exploded
they couldn't have exploded	I couldn't have been exploding
you couldn't have been exploding
he couldn't have been exploding
we couldn't have been exploding
you couldn't have been exploding
they couldn't have been exploding	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I explode?
could you explode?
could he explode?
could we explode?
could you explode?
could they explode? 	could I be exploding?
could you be exploding?
could he be exploding?
could we be exploding?
could you be exploding?
could they be exploding? 	could I have exploded?
could you have exploded?
could he have exploded?
could we have exploded?
could you have exploded?
could they have exploded? 	could I have been exploding?
could you have been exploding?
could he have been exploding?
could we have been exploding?
could you have been exploding?
could they have been exploding? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I explode?
couldn't you explode?
couldn't he explode?
couldn't we explode?
couldn't you explode?
couldn't they explode? 	couldn't I be exploding?
couldn't you be exploding?
couldn't he be exploding?
couldn't we be exploding?
couldn't you be exploding?
couldn't they be exploding? 	couldn't I have exploded?
couldn't you have exploded?
couldn't he have exploded?
couldn't we have exploded?
couldn't you have exploded?
couldn't they have exploded? 	couldn't I have been exploding?
couldn't you have been exploding?
couldn't he have been exploding?
couldn't we have been exploding?
couldn't you have been exploding?
couldn't they have been exploding?