can preheat
Regular verb: preheat - preheated- preheated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can preheat
you can preheat
he can preheat
we can preheat
you can preheat
they can preheat 	I can be preheating
you can be preheating
he can be preheating
we can be preheating
you can be preheating
they can be preheating	I can have preheated
you can have preheated
he can have preheated
we can have preheated
you can have preheated
they can have preheated	I can have been preheating
you can have been preheating
he can have been preheating
we can have been preheating
you can have been preheating
they can have been preheating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't preheat
you can't preheat
he can't preheat
we can't preheat
you can't preheat
they can't preheat 	I can't be preheating
you can't be preheating
he can't be preheating
we can't be preheating
you can't be preheating
they can't be preheating	I can't have preheated
you can't have preheated
he can't have preheated
we can't have preheated
you can't have preheated
they can't have preheated	I can't have been preheating
you can't have been preheating
he can't have been preheating
we can't have been preheating
you can't have been preheating
they can't have been preheating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I preheat?
can you preheat?
can he preheat?
can we preheat?
can you preheat?
can they preheat? 	can I be preheating?
can you be preheating?
can he be preheating?
can we be preheating?
can you be preheating?
can they be preheating? 	can I have preheated?
can you have preheated?
can he have preheated?
can we have preheated?
can you have preheated?
can they have preheated? 	can I have been preheating?
can you have been preheating?
can he have been preheating?
can we have been preheating?
can you have been preheating?
can they have been preheating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I preheat?
can't you preheat?
can't he preheat?
can't we preheat?
can't you preheat?
can't they preheat? 	can't I be preheating?
can't you be preheating?
can't he be preheating?
can't we be preheating?
can't you be preheating?
can't they be preheating? 	can't I have preheated?
can't you have preheated?
can't he have preheated?
can't we have preheated?
can't you have preheated?
can't they have preheated? 	can't I have been preheating?
can't you have been preheating?
can't he have been preheating?
can't we have been preheating?
can't you have been preheating?
can't they have been preheating?