can ventilate
Regular verb: ventilate - ventilated- ventilated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can ventilate
you can ventilate
she can ventilate
we can ventilate
you can ventilate
they can ventilate 	I can be ventilating
you can be ventilating
she can be ventilating
we can be ventilating
you can be ventilating
they can be ventilating	I can have ventilated
you can have ventilated
she can have ventilated
we can have ventilated
you can have ventilated
they can have ventilated	I can have been ventilating
you can have been ventilating
she can have been ventilating
we can have been ventilating
you can have been ventilating
they can have been ventilating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't ventilate
you can't ventilate
she can't ventilate
we can't ventilate
you can't ventilate
they can't ventilate 	I can't be ventilating
you can't be ventilating
she can't be ventilating
we can't be ventilating
you can't be ventilating
they can't be ventilating	I can't have ventilated
you can't have ventilated
she can't have ventilated
we can't have ventilated
you can't have ventilated
they can't have ventilated	I can't have been ventilating
you can't have been ventilating
she can't have been ventilating
we can't have been ventilating
you can't have been ventilating
they can't have been ventilating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I ventilate?
can you ventilate?
can she ventilate?
can we ventilate?
can you ventilate?
can they ventilate? 	can I be ventilating?
can you be ventilating?
can she be ventilating?
can we be ventilating?
can you be ventilating?
can they be ventilating? 	can I have ventilated?
can you have ventilated?
can she have ventilated?
can we have ventilated?
can you have ventilated?
can they have ventilated? 	can I have been ventilating?
can you have been ventilating?
can she have been ventilating?
can we have been ventilating?
can you have been ventilating?
can they have been ventilating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I ventilate?
can't you ventilate?
can't she ventilate?
can't we ventilate?
can't you ventilate?
can't they ventilate? 	can't I be ventilating?
can't you be ventilating?
can't she be ventilating?
can't we be ventilating?
can't you be ventilating?
can't they be ventilating? 	can't I have ventilated?
can't you have ventilated?
can't she have ventilated?
can't we have ventilated?
can't you have ventilated?
can't they have ventilated? 	can't I have been ventilating?
can't you have been ventilating?
can't she have been ventilating?
can't we have been ventilating?
can't you have been ventilating?
can't they have been ventilating?