English verb conjugation
COULD PLAGUE

Regular verb: plague - plagued - plagued

Affirmation

Simple form	V-ing form
I could plague you could plague he could plague we could plague you could plague they could plague	I could be plaguing you could be plaguing he could be plaguing we could be plaguing you could be plaguing they could be plaguing
Perfect	V-ing perfect
I could have plagued you could have plagued he could have plagued we could have plagued you could have plagued they could have plagued	I could have been plaguing you could have been plaguing he could have been plaguing we could have been plaguing you could have been plaguing they could have been plaguing

Negation

Simple form	V-ing form
I could not plague you could not plague he could not plague we could not plague you could not plague they could not plague	I could not be plaguing you could not be plaguing he could not be plaguing we could not be plaguing you could not be plaguing they could not be plaguing
Perfect	V-ing perfect
I could not have plagued you could not have plagued he could not have plagued we could not have plagued you could not have plagued they could not have plagued	I could not have been plaguing you could not have been plaguing he could not have been plaguing we could not have been plaguing you could not have been plaguing they could not have been plaguing

Interrogative form

Simple form	V-ing form
could I plague? could you plague? could he plague? could we plague? could you plague? could they plague?	could I be plaguing? could you be plaguing? could he be plaguing? could we be plaguing? could you be plaguing? could they be plaguing?
Perfect	V-ing perfect
could I have plagued? could you have plagued? could he have plagued? could we have plagued? could you have plagued? could they have plagued?	could I have been plaguing? could you have been plaguing? could he have been plaguing? could we have been plaguing? could you have been plaguing? could they have been plaguing?

Interro-negative form

Simple form	V-ing form
could I not plague? could you not plague? could he not plague? could we not plague? could you not plague? could they not plague?	could I not be plaguing? could you not be plaguing? could he not be plaguing? could we not be plaguing? could you not be plaguing? could they not be plaguing?
Perfect	V-ing perfect
could I not have plagued? could you not have plagued? could he not have plagued? could we not have plagued? could you not have plagued? could they not have plagued?	could I not have been plaguing? could you not have been plaguing? could he not have been plaguing? could we not have been plaguing? could you not have been plaguing? could they not have been plaguing?