English verb conjugation
COULD SUBIRRIGATE

Regular verb: subirrigate - subirrigated - subirrigated

Affirmation

Simple form	V-ing form
I could subirrigate you could subirrigate he could subirrigate we could subirrigate you could subirrigate they could subirrigate	I could be subirrigating you could be subirrigating he could be subirrigating we could be subirrigating you could be subirrigating they could be subirrigating
Perfect	V-ing perfect
I could have subirrigated you could have subirrigated he could have subirrigated we could have subirrigated you could have subirrigated they could have subirrigated	I could have been subirrigating you could have been subirrigating he could have been subirrigating we could have been subirrigating you could have been subirrigating they could have been subirrigating

Negation

Simple form	V-ing form
I couldn't subirrigate you couldn't subirrigate he couldn't subirrigate we couldn't subirrigate you couldn't subirrigate they couldn't subirrigate	I couldn't be subirrigating you couldn't be subirrigating he couldn't be subirrigating we couldn't be subirrigating you couldn't be subirrigating they couldn't be subirrigating
Perfect	V-ing perfect
I couldn't have subirrigated you couldn't have subirrigated he couldn't have subirrigated we couldn't have subirrigated you couldn't have subirrigated they couldn't have subirrigated	I couldn't have been subirrigating you couldn't have been subirrigating he couldn't have been subirrigating we couldn't have been subirrigating you couldn't have been subirrigating they couldn't have been subirrigating

Interrogative form

Simple form	V-ing form
could I subirrigate? could you subirrigate? could he subirrigate? could we subirrigate? could you subirrigate? could they subirrigate?	could I be subirrigating? could you be subirrigating? could he be subirrigating? could we be subirrigating? could you be subirrigating? could they be subirrigating?
Perfect	V-ing perfect
could I have subirrigated? could you have subirrigated? could he have subirrigated? could we have subirrigated? could you have subirrigated? could they have subirrigated?	could I have been subirrigating? could you have been subirrigating? could he have been subirrigating? could we have been subirrigating? could you have been subirrigating? could they have been subirrigating?

Interro-negative form

Simple form	V-ing form
couldn't I subirrigate? couldn't you subirrigate? couldn't he subirrigate? couldn't we subirrigate? couldn't you subirrigate? couldn't they subirrigate?	couldn't I be subirrigating? couldn't you be subirrigating? couldn't he be subirrigating? couldn't we be subirrigating? couldn't you be subirrigating? couldn't they be subirrigating?
Perfect	V-ing perfect
couldn't I have subirrigated? couldn't you have subirrigated? couldn't he have subirrigated? couldn't we have subirrigated? couldn't you have subirrigated? couldn't they have subirrigated?	couldn't I have been subirrigating? couldn't you have been subirrigating? couldn't he have been subirrigating? couldn't we have been subirrigating? couldn't you have been subirrigating? couldn't they have been subirrigating?