can heliograph
Regular verb: heliograph - heliographed- heliographed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can heliograph
you can heliograph
he can heliograph
we can heliograph
you can heliograph
they can heliograph 	I can be heliographing
you can be heliographing
he can be heliographing
we can be heliographing
you can be heliographing
they can be heliographing	I can have heliographed
you can have heliographed
he can have heliographed
we can have heliographed
you can have heliographed
they can have heliographed	I can have been heliographing
you can have been heliographing
he can have been heliographing
we can have been heliographing
you can have been heliographing
they can have been heliographing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot heliograph
you cannot heliograph
he cannot heliograph
we cannot heliograph
you cannot heliograph
they cannot heliograph 	I cannot be heliographing
you cannot be heliographing
he cannot be heliographing
we cannot be heliographing
you cannot be heliographing
they cannot be heliographing	I cannot have heliographed
you cannot have heliographed
he cannot have heliographed
we cannot have heliographed
you cannot have heliographed
they cannot have heliographed	I cannot have been heliographing
you cannot have been heliographing
he cannot have been heliographing
we cannot have been heliographing
you cannot have been heliographing
they cannot have been heliographing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I heliograph?
can you heliograph?
can he heliograph?
can we heliograph?
can you heliograph?
can they heliograph? 	can I be heliographing?
can you be heliographing?
can he be heliographing?
can we be heliographing?
can you be heliographing?
can they be heliographing? 	can I have heliographed?
can you have heliographed?
can he have heliographed?
can we have heliographed?
can you have heliographed?
can they have heliographed? 	can I have been heliographing?
can you have been heliographing?
can he have been heliographing?
can we have been heliographing?
can you have been heliographing?
can they have been heliographing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not heliograph?
can you not heliograph?
can he not heliograph?
can we not heliograph?
can you not heliograph?
can they not heliograph? 	can I not be heliographing?
can you not be heliographing?
can he not be heliographing?
can we not be heliographing?
can you not be heliographing?
can they not be heliographing? 	can I not have heliographed?
can you not have heliographed?
can he not have heliographed?
can we not have heliographed?
can you not have heliographed?
can they not have heliographed? 	can I not have been heliographing?
can you not have been heliographing?
can he not have been heliographing?
can we not have been heliographing?
can you not have been heliographing?
can they not have been heliographing?