can modulate
Regular verb: modulate - modulated- modulated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can modulate
you can modulate
she can modulate
we can modulate
you can modulate
they can modulate 	I can be modulating
you can be modulating
she can be modulating
we can be modulating
you can be modulating
they can be modulating	I can have modulated
you can have modulated
she can have modulated
we can have modulated
you can have modulated
they can have modulated	I can have been modulating
you can have been modulating
she can have been modulating
we can have been modulating
you can have been modulating
they can have been modulating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't modulate
you can't modulate
she can't modulate
we can't modulate
you can't modulate
they can't modulate 	I can't be modulating
you can't be modulating
she can't be modulating
we can't be modulating
you can't be modulating
they can't be modulating	I can't have modulated
you can't have modulated
she can't have modulated
we can't have modulated
you can't have modulated
they can't have modulated	I can't have been modulating
you can't have been modulating
she can't have been modulating
we can't have been modulating
you can't have been modulating
they can't have been modulating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I modulate?
can you modulate?
can she modulate?
can we modulate?
can you modulate?
can they modulate? 	can I be modulating?
can you be modulating?
can she be modulating?
can we be modulating?
can you be modulating?
can they be modulating? 	can I have modulated?
can you have modulated?
can she have modulated?
can we have modulated?
can you have modulated?
can they have modulated? 	can I have been modulating?
can you have been modulating?
can she have been modulating?
can we have been modulating?
can you have been modulating?
can they have been modulating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I modulate?
can't you modulate?
can't she modulate?
can't we modulate?
can't you modulate?
can't they modulate? 	can't I be modulating?
can't you be modulating?
can't she be modulating?
can't we be modulating?
can't you be modulating?
can't they be modulating? 	can't I have modulated?
can't you have modulated?
can't she have modulated?
can't we have modulated?
can't you have modulated?
can't they have modulated? 	can't I have been modulating?
can't you have been modulating?
can't she have been modulating?
can't we have been modulating?
can't you have been modulating?
can't they have been modulating?