English verb conjugation
COULD SUMMIT

Regular verb: summit - summited - summited

Affirmation

Simple form	V-ing form
I could summit you could summit he could summit we could summit you could summit they could summit	I could be summiting you could be summiting he could be summiting we could be summiting you could be summiting they could be summiting
Perfect	V-ing perfect
I could have summited you could have summited he could have summited we could have summited you could have summited they could have summited	I could have been summiting you could have been summiting he could have been summiting we could have been summiting you could have been summiting they could have been summiting

Negation

Simple form	V-ing form
I couldn't summit you couldn't summit he couldn't summit we couldn't summit you couldn't summit they couldn't summit	I couldn't be summiting you couldn't be summiting he couldn't be summiting we couldn't be summiting you couldn't be summiting they couldn't be summiting
Perfect	V-ing perfect
I couldn't have summited you couldn't have summited he couldn't have summited we couldn't have summited you couldn't have summited they couldn't have summited	I couldn't have been summiting you couldn't have been summiting he couldn't have been summiting we couldn't have been summiting you couldn't have been summiting they couldn't have been summiting

Interrogative form

Simple form	V-ing form
could I summit? could you summit? could he summit? could we summit? could you summit? could they summit?	could I be summiting? could you be summiting? could he be summiting? could we be summiting? could you be summiting? could they be summiting?
Perfect	V-ing perfect
could I have summited? could you have summited? could he have summited? could we have summited? could you have summited? could they have summited?	could I have been summiting? could you have been summiting? could he have been summiting? could we have been summiting? could you have been summiting? could they have been summiting?

Interro-negative form

Simple form	V-ing form
couldn't I summit? couldn't you summit? couldn't he summit? couldn't we summit? couldn't you summit? couldn't they summit?	couldn't I be summiting? couldn't you be summiting? couldn't he be summiting? couldn't we be summiting? couldn't you be summiting? couldn't they be summiting?
Perfect	V-ing perfect
couldn't I have summited? couldn't you have summited? couldn't he have summited? couldn't we have summited? couldn't you have summited? couldn't they have summited?	couldn't I have been summiting? couldn't you have been summiting? couldn't he have been summiting? couldn't we have been summiting? couldn't you have been summiting? couldn't they have been summiting?