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 couldn't stag you couldn't stag he couldn't stag we couldn't stag you couldn't stag they couldn't stag	I couldn't be staging you couldn't be staging he couldn't be staging we couldn't be staging you couldn't be staging they couldn't be staging
Perfect	V-ing perfect
I couldn't have staged you couldn't have staged he couldn't have staged we couldn't have staged you couldn't have staged they couldn't have staged	I couldn't have been staging you couldn't have been staging he couldn't have been staging we couldn't have been staging you couldn't have been staging they couldn't 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
couldn't I stag? couldn't you stag? couldn't he stag? couldn't we stag? couldn't you stag? couldn't they stag?	couldn't I be staging? couldn't you be staging? couldn't he be staging? couldn't we be staging? couldn't you be staging? couldn't they be staging?
Perfect	V-ing perfect
couldn't I have staged? couldn't you have staged? couldn't he have staged? couldn't we have staged? couldn't you have staged? couldn't they have staged?	couldn't I have been staging? couldn't you have been staging? couldn't he have been staging? couldn't we have been staging? couldn't you have been staging? couldn't they have been staging?