English verb conjugation
COULD LICHEN

Regular verb: lichen - lichened - lichened

Affirmation

Simple form	V-ing form
I could lichen you could lichen she could lichen we could lichen you could lichen they could lichen	I could be lichening you could be lichening she 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 she 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 she 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 couldn't lichen you couldn't lichen she couldn't lichen we couldn't lichen you couldn't lichen they couldn't lichen	I couldn't be lichening you couldn't be lichening she couldn't be lichening we couldn't be lichening you couldn't be lichening they couldn't be lichening
Perfect	V-ing perfect
I couldn't have lichened you couldn't have lichened she couldn't have lichened we couldn't have lichened you couldn't have lichened they couldn't have lichened	I couldn't have been lichening you couldn't have been lichening she couldn't have been lichening we couldn't have been lichening you couldn't have been lichening they couldn't have been lichening

Interrogative form

Simple form	V-ing form
could I lichen? could you lichen? could she lichen? could we lichen? could you lichen? could they lichen?	could I be lichening? could you be lichening? could she 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 she 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 she 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
couldn't I lichen? couldn't you lichen? couldn't she lichen? couldn't we lichen? couldn't you lichen? couldn't they lichen?	couldn't I be lichening? couldn't you be lichening? couldn't she be lichening? couldn't we be lichening? couldn't you be lichening? couldn't they be lichening?
Perfect	V-ing perfect
couldn't I have lichened? couldn't you have lichened? couldn't she have lichened? couldn't we have lichened? couldn't you have lichened? couldn't they have lichened?	couldn't I have been lichening? couldn't you have been lichening? couldn't she have been lichening? couldn't we have been lichening? couldn't you have been lichening? couldn't they have been lichening?