can ossify
Regular verb: ossify - ossified- ossified

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can ossify
you can ossify
she can ossify
we can ossify
you can ossify
they can ossify 	I can be ossifying
you can be ossifying
she can be ossifying
we can be ossifying
you can be ossifying
they can be ossifying	I can have ossified
you can have ossified
she can have ossified
we can have ossified
you can have ossified
they can have ossified	I can have been ossifying
you can have been ossifying
she can have been ossifying
we can have been ossifying
you can have been ossifying
they can have been ossifying	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't ossify
you can't ossify
she can't ossify
we can't ossify
you can't ossify
they can't ossify 	I can't be ossifying
you can't be ossifying
she can't be ossifying
we can't be ossifying
you can't be ossifying
they can't be ossifying	I can't have ossified
you can't have ossified
she can't have ossified
we can't have ossified
you can't have ossified
they can't have ossified	I can't have been ossifying
you can't have been ossifying
she can't have been ossifying
we can't have been ossifying
you can't have been ossifying
they can't have been ossifying	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I ossify?
can you ossify?
can she ossify?
can we ossify?
can you ossify?
can they ossify? 	can I be ossifying?
can you be ossifying?
can she be ossifying?
can we be ossifying?
can you be ossifying?
can they be ossifying? 	can I have ossified?
can you have ossified?
can she have ossified?
can we have ossified?
can you have ossified?
can they have ossified? 	can I have been ossifying?
can you have been ossifying?
can she have been ossifying?
can we have been ossifying?
can you have been ossifying?
can they have been ossifying? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I ossify?
can't you ossify?
can't she ossify?
can't we ossify?
can't you ossify?
can't they ossify? 	can't I be ossifying?
can't you be ossifying?
can't she be ossifying?
can't we be ossifying?
can't you be ossifying?
can't they be ossifying? 	can't I have ossified?
can't you have ossified?
can't she have ossified?
can't we have ossified?
can't you have ossified?
can't they have ossified? 	can't I have been ossifying?
can't you have been ossifying?
can't she have been ossifying?
can't we have been ossifying?
can't you have been ossifying?
can't they have been ossifying?