can lichen
Regular verb: lichen - lichened- lichened

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

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't lichen
you can't lichen
he can't lichen
we can't lichen
you can't lichen
they can't lichen 	I can't be lichening
you can't be lichening
he can't be lichening
we can't be lichening
you can't be lichening
they can't be lichening	I can't have lichened
you can't have lichened
he can't have lichened
we can't have lichened
you can't have lichened
they can't have lichened	I can't have been lichening
you can't have been lichening
he can't have been lichening
we can't have been lichening
you can't have been lichening
they can't have been lichening	

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

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I lichen?
can't you lichen?
can't he lichen?
can't we lichen?
can't you lichen?
can't they lichen? 	can't I be lichening?
can't you be lichening?
can't he be lichening?
can't we be lichening?
can't you be lichening?
can't they be lichening? 	can't I have lichened?
can't you have lichened?
can't he have lichened?
can't we have lichened?
can't you have lichened?
can't they have lichened? 	can't I have been lichening?
can't you have been lichening?
can't he have been lichening?
can't we have been lichening?
can't you have been lichening?
can't they have been lichening?