can gem
Regular verb: gem - gemed- gemed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can gem
you can gem
she can gem
we can gem
you can gem
they can gem 	I can be geming
you can be geming
she can be geming
we can be geming
you can be geming
they can be geming	I can have gemed
you can have gemed
she can have gemed
we can have gemed
you can have gemed
they can have gemed	I can have been geming
you can have been geming
she can have been geming
we can have been geming
you can have been geming
they can have been geming	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot gem
you cannot gem
she cannot gem
we cannot gem
you cannot gem
they cannot gem 	I cannot be geming
you cannot be geming
she cannot be geming
we cannot be geming
you cannot be geming
they cannot be geming	I cannot have gemed
you cannot have gemed
she cannot have gemed
we cannot have gemed
you cannot have gemed
they cannot have gemed	I cannot have been geming
you cannot have been geming
she cannot have been geming
we cannot have been geming
you cannot have been geming
they cannot have been geming	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I gem?
can you gem?
can she gem?
can we gem?
can you gem?
can they gem? 	can I be geming?
can you be geming?
can she be geming?
can we be geming?
can you be geming?
can they be geming? 	can I have gemed?
can you have gemed?
can she have gemed?
can we have gemed?
can you have gemed?
can they have gemed? 	can I have been geming?
can you have been geming?
can she have been geming?
can we have been geming?
can you have been geming?
can they have been geming? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not gem?
can you not gem?
can she not gem?
can we not gem?
can you not gem?
can they not gem? 	can I not be geming?
can you not be geming?
can she not be geming?
can we not be geming?
can you not be geming?
can they not be geming? 	can I not have gemed?
can you not have gemed?
can she not have gemed?
can we not have gemed?
can you not have gemed?
can they not have gemed? 	can I not have been geming?
can you not have been geming?
can she not have been geming?
can we not have been geming?
can you not have been geming?
can they not have been geming?