could preexpose
Regular verb: preexpose - preexposed- preexposed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could preexpose
you could preexpose
he could preexpose
we could preexpose
you could preexpose
they could preexpose 	I could be preexposing
you could be preexposing
he could be preexposing
we could be preexposing
you could be preexposing
they could be preexposing	I could have preexposed
you could have preexposed
he could have preexposed
we could have preexposed
you could have preexposed
they could have preexposed	I could have been preexposing
you could have been preexposing
he could have been preexposing
we could have been preexposing
you could have been preexposing
they could have been preexposing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't preexpose
you couldn't preexpose
he couldn't preexpose
we couldn't preexpose
you couldn't preexpose
they couldn't preexpose 	I couldn't be preexposing
you couldn't be preexposing
he couldn't be preexposing
we couldn't be preexposing
you couldn't be preexposing
they couldn't be preexposing	I couldn't have preexposed
you couldn't have preexposed
he couldn't have preexposed
we couldn't have preexposed
you couldn't have preexposed
they couldn't have preexposed	I couldn't have been preexposing
you couldn't have been preexposing
he couldn't have been preexposing
we couldn't have been preexposing
you couldn't have been preexposing
they couldn't have been preexposing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I preexpose?
could you preexpose?
could he preexpose?
could we preexpose?
could you preexpose?
could they preexpose? 	could I be preexposing?
could you be preexposing?
could he be preexposing?
could we be preexposing?
could you be preexposing?
could they be preexposing? 	could I have preexposed?
could you have preexposed?
could he have preexposed?
could we have preexposed?
could you have preexposed?
could they have preexposed? 	could I have been preexposing?
could you have been preexposing?
could he have been preexposing?
could we have been preexposing?
could you have been preexposing?
could they have been preexposing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I preexpose?
couldn't you preexpose?
couldn't he preexpose?
couldn't we preexpose?
couldn't you preexpose?
couldn't they preexpose? 	couldn't I be preexposing?
couldn't you be preexposing?
couldn't he be preexposing?
couldn't we be preexposing?
couldn't you be preexposing?
couldn't they be preexposing? 	couldn't I have preexposed?
couldn't you have preexposed?
couldn't he have preexposed?
couldn't we have preexposed?
couldn't you have preexposed?
couldn't they have preexposed? 	couldn't I have been preexposing?
couldn't you have been preexposing?
couldn't he have been preexposing?
couldn't we have been preexposing?
couldn't you have been preexposing?
couldn't they have been preexposing?