can frost
Regular verb: frost - frosted- frosted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can frost
you can frost
she can frost
we can frost
you can frost
they can frost 	I can be frosting
you can be frosting
she can be frosting
we can be frosting
you can be frosting
they can be frosting	I can have frosted
you can have frosted
she can have frosted
we can have frosted
you can have frosted
they can have frosted	I can have been frosting
you can have been frosting
she can have been frosting
we can have been frosting
you can have been frosting
they can have been frosting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot frost
you cannot frost
she cannot frost
we cannot frost
you cannot frost
they cannot frost 	I cannot be frosting
you cannot be frosting
she cannot be frosting
we cannot be frosting
you cannot be frosting
they cannot be frosting	I cannot have frosted
you cannot have frosted
she cannot have frosted
we cannot have frosted
you cannot have frosted
they cannot have frosted	I cannot have been frosting
you cannot have been frosting
she cannot have been frosting
we cannot have been frosting
you cannot have been frosting
they cannot have been frosting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I frost?
can you frost?
can she frost?
can we frost?
can you frost?
can they frost? 	can I be frosting?
can you be frosting?
can she be frosting?
can we be frosting?
can you be frosting?
can they be frosting? 	can I have frosted?
can you have frosted?
can she have frosted?
can we have frosted?
can you have frosted?
can they have frosted? 	can I have been frosting?
can you have been frosting?
can she have been frosting?
can we have been frosting?
can you have been frosting?
can they have been frosting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not frost?
can you not frost?
can she not frost?
can we not frost?
can you not frost?
can they not frost? 	can I not be frosting?
can you not be frosting?
can she not be frosting?
can we not be frosting?
can you not be frosting?
can they not be frosting? 	can I not have frosted?
can you not have frosted?
can she not have frosted?
can we not have frosted?
can you not have frosted?
can they not have frosted? 	can I not have been frosting?
can you not have been frosting?
can she not have been frosting?
can we not have been frosting?
can you not have been frosting?
can they not have been frosting?