English verb conjugation
COULD SEMAPHORE

Regular verb: semaphore - semaphored - semaphored

Affirmation

Simple form	V-ing form
I could semaphore you could semaphore he could semaphore we could semaphore you could semaphore they could semaphore	I could be semaphoring you could be semaphoring he could be semaphoring we could be semaphoring you could be semaphoring they could be semaphoring
Perfect	V-ing perfect
I could have semaphored you could have semaphored he could have semaphored we could have semaphored you could have semaphored they could have semaphored	I could have been semaphoring you could have been semaphoring he could have been semaphoring we could have been semaphoring you could have been semaphoring they could have been semaphoring

Negation

Simple form	V-ing form
I could not semaphore you could not semaphore he could not semaphore we could not semaphore you could not semaphore they could not semaphore	I could not be semaphoring you could not be semaphoring he could not be semaphoring we could not be semaphoring you could not be semaphoring they could not be semaphoring
Perfect	V-ing perfect
I could not have semaphored you could not have semaphored he could not have semaphored we could not have semaphored you could not have semaphored they could not have semaphored	I could not have been semaphoring you could not have been semaphoring he could not have been semaphoring we could not have been semaphoring you could not have been semaphoring they could not have been semaphoring

Interrogative form

Simple form	V-ing form
could I semaphore? could you semaphore? could he semaphore? could we semaphore? could you semaphore? could they semaphore?	could I be semaphoring? could you be semaphoring? could he be semaphoring? could we be semaphoring? could you be semaphoring? could they be semaphoring?
Perfect	V-ing perfect
could I have semaphored? could you have semaphored? could he have semaphored? could we have semaphored? could you have semaphored? could they have semaphored?	could I have been semaphoring? could you have been semaphoring? could he have been semaphoring? could we have been semaphoring? could you have been semaphoring? could they have been semaphoring?

Interro-negative form

Simple form	V-ing form
could I not semaphore? could you not semaphore? could he not semaphore? could we not semaphore? could you not semaphore? could they not semaphore?	could I not be semaphoring? could you not be semaphoring? could he not be semaphoring? could we not be semaphoring? could you not be semaphoring? could they not be semaphoring?
Perfect	V-ing perfect
could I not have semaphored? could you not have semaphored? could he not have semaphored? could we not have semaphored? could you not have semaphored? could they not have semaphored?	could I not have been semaphoring? could you not have been semaphoring? could he not have been semaphoring? could we not have been semaphoring? could you not have been semaphoring? could they not have been semaphoring?