English verb conjugation
COULD OVERSTRAIN

Regular verb: overstrain - overstrained - overstrained

Affirmation

Simple form	V-ing form
I could overstrain you could overstrain he could overstrain we could overstrain you could overstrain they could overstrain	I could be overstraining you could be overstraining he could be overstraining we could be overstraining you could be overstraining they could be overstraining
Perfect	V-ing perfect
I could have overstrained you could have overstrained he could have overstrained we could have overstrained you could have overstrained they could have overstrained	I could have been overstraining you could have been overstraining he could have been overstraining we could have been overstraining you could have been overstraining they could have been overstraining

Negation

Simple form	V-ing form
I could not overstrain you could not overstrain he could not overstrain we could not overstrain you could not overstrain they could not overstrain	I could not be overstraining you could not be overstraining he could not be overstraining we could not be overstraining you could not be overstraining they could not be overstraining
Perfect	V-ing perfect
I could not have overstrained you could not have overstrained he could not have overstrained we could not have overstrained you could not have overstrained they could not have overstrained	I could not have been overstraining you could not have been overstraining he could not have been overstraining we could not have been overstraining you could not have been overstraining they could not have been overstraining

Interrogative form

Simple form	V-ing form
could I overstrain? could you overstrain? could he overstrain? could we overstrain? could you overstrain? could they overstrain?	could I be overstraining? could you be overstraining? could he be overstraining? could we be overstraining? could you be overstraining? could they be overstraining?
Perfect	V-ing perfect
could I have overstrained? could you have overstrained? could he have overstrained? could we have overstrained? could you have overstrained? could they have overstrained?	could I have been overstraining? could you have been overstraining? could he have been overstraining? could we have been overstraining? could you have been overstraining? could they have been overstraining?

Interro-negative form

Simple form	V-ing form
could I not overstrain? could you not overstrain? could he not overstrain? could we not overstrain? could you not overstrain? could they not overstrain?	could I not be overstraining? could you not be overstraining? could he not be overstraining? could we not be overstraining? could you not be overstraining? could they not be overstraining?
Perfect	V-ing perfect
could I not have overstrained? could you not have overstrained? could he not have overstrained? could we not have overstrained? could you not have overstrained? could they not have overstrained?	could I not have been overstraining? could you not have been overstraining? could he not have been overstraining? could we not have been overstraining? could you not have been overstraining? could they not have been overstraining?