English verb conjugation
COULD PREEXPOSE

Regular verb: preexpose - preexposed - preexposed

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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
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
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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?