English verb conjugation
COULD LICHEN

Regular verb: lichen - lichened - lichened

Affirmation

Simple form	V-ing form
I could lichen you could lichen he could lichen we could lichen you could lichen they could lichen	I could be lichening you could be lichening he could be lichening we could be lichening you could be lichening they could be lichening
Perfect	V-ing perfect
I could have lichened you could have lichened he could have lichened we could have lichened you could have lichened they could have lichened	I could have been lichening you could have been lichening he could have been lichening we could have been lichening you could have been lichening they could have been lichening

Negation

Simple form	V-ing form
I could not lichen you could not lichen he could not lichen we could not lichen you could not lichen they could not lichen	I could not be lichening you could not be lichening he could not be lichening we could not be lichening you could not be lichening they could not be lichening
Perfect	V-ing perfect
I could not have lichened you could not have lichened he could not have lichened we could not have lichened you could not have lichened they could not have lichened	I could not have been lichening you could not have been lichening he could not have been lichening we could not have been lichening you could not have been lichening they could not have been lichening

Interrogative form

Simple form	V-ing form
could I lichen? could you lichen? could he lichen? could we lichen? could you lichen? could they lichen?	could I be lichening? could you be lichening? could he be lichening? could we be lichening? could you be lichening? could they be lichening?
Perfect	V-ing perfect
could I have lichened? could you have lichened? could he have lichened? could we have lichened? could you have lichened? could they have lichened?	could I have been lichening? could you have been lichening? could he have been lichening? could we have been lichening? could you have been lichening? could they have been lichening?

Interro-negative form

Simple form	V-ing form
could I not lichen? could you not lichen? could he not lichen? could we not lichen? could you not lichen? could they not lichen?	could I not be lichening? could you not be lichening? could he not be lichening? could we not be lichening? could you not be lichening? could they not be lichening?
Perfect	V-ing perfect
could I not have lichened? could you not have lichened? could he not have lichened? could we not have lichened? could you not have lichened? could they not have lichened?	could I not have been lichening? could you not have been lichening? could he not have been lichening? could we not have been lichening? could you not have been lichening? could they not have been lichening?