English verb conjugation
COULD STAG

Regular verb: stag - staged - staged

Affirmation

Simple form	V-ing form
I could stag you could stag he could stag we could stag you could stag they could stag	I could be staging you could be staging he could be staging we could be staging you could be staging they could be staging
Perfect	V-ing perfect
I could have staged you could have staged he could have staged we could have staged you could have staged they could have staged	I could have been staging you could have been staging he could have been staging we could have been staging you could have been staging they could have been staging

Negation

Simple form	V-ing form
I could not stag you could not stag he could not stag we could not stag you could not stag they could not stag	I could not be staging you could not be staging he could not be staging we could not be staging you could not be staging they could not be staging
Perfect	V-ing perfect
I could not have staged you could not have staged he could not have staged we could not have staged you could not have staged they could not have staged	I could not have been staging you could not have been staging he could not have been staging we could not have been staging you could not have been staging they could not have been staging

Interrogative form

Simple form	V-ing form
could I stag? could you stag? could he stag? could we stag? could you stag? could they stag?	could I be staging? could you be staging? could he be staging? could we be staging? could you be staging? could they be staging?
Perfect	V-ing perfect
could I have staged? could you have staged? could he have staged? could we have staged? could you have staged? could they have staged?	could I have been staging? could you have been staging? could he have been staging? could we have been staging? could you have been staging? could they have been staging?

Interro-negative form

Simple form	V-ing form
could I not stag? could you not stag? could he not stag? could we not stag? could you not stag? could they not stag?	could I not be staging? could you not be staging? could he not be staging? could we not be staging? could you not be staging? could they not be staging?
Perfect	V-ing perfect
could I not have staged? could you not have staged? could he not have staged? could we not have staged? could you not have staged? could they not have staged?	could I not have been staging? could you not have been staging? could he not have been staging? could we not have been staging? could you not have been staging? could they not have been staging?