can suffocate
Regular verb: suffocate - suffocated- suffocated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can suffocate
you can suffocate
she can suffocate
we can suffocate
you can suffocate
they can suffocate 	I can be suffocating
you can be suffocating
she can be suffocating
we can be suffocating
you can be suffocating
they can be suffocating	I can have suffocated
you can have suffocated
she can have suffocated
we can have suffocated
you can have suffocated
they can have suffocated	I can have been suffocating
you can have been suffocating
she can have been suffocating
we can have been suffocating
you can have been suffocating
they can have been suffocating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't suffocate
you can't suffocate
she can't suffocate
we can't suffocate
you can't suffocate
they can't suffocate 	I can't be suffocating
you can't be suffocating
she can't be suffocating
we can't be suffocating
you can't be suffocating
they can't be suffocating	I can't have suffocated
you can't have suffocated
she can't have suffocated
we can't have suffocated
you can't have suffocated
they can't have suffocated	I can't have been suffocating
you can't have been suffocating
she can't have been suffocating
we can't have been suffocating
you can't have been suffocating
they can't have been suffocating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I suffocate?
can you suffocate?
can she suffocate?
can we suffocate?
can you suffocate?
can they suffocate? 	can I be suffocating?
can you be suffocating?
can she be suffocating?
can we be suffocating?
can you be suffocating?
can they be suffocating? 	can I have suffocated?
can you have suffocated?
can she have suffocated?
can we have suffocated?
can you have suffocated?
can they have suffocated? 	can I have been suffocating?
can you have been suffocating?
can she have been suffocating?
can we have been suffocating?
can you have been suffocating?
can they have been suffocating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I suffocate?
can't you suffocate?
can't she suffocate?
can't we suffocate?
can't you suffocate?
can't they suffocate? 	can't I be suffocating?
can't you be suffocating?
can't she be suffocating?
can't we be suffocating?
can't you be suffocating?
can't they be suffocating? 	can't I have suffocated?
can't you have suffocated?
can't she have suffocated?
can't we have suffocated?
can't you have suffocated?
can't they have suffocated? 	can't I have been suffocating?
can't you have been suffocating?
can't she have been suffocating?
can't we have been suffocating?
can't you have been suffocating?
can't they have been suffocating?