can underheat
Regular verb: underheat - underheated- underheated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can underheat
you can underheat
he can underheat
we can underheat
you can underheat
they can underheat 	I can be underheating
you can be underheating
he can be underheating
we can be underheating
you can be underheating
they can be underheating	I can have underheated
you can have underheated
he can have underheated
we can have underheated
you can have underheated
they can have underheated	I can have been underheating
you can have been underheating
he can have been underheating
we can have been underheating
you can have been underheating
they can have been underheating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't underheat
you can't underheat
he can't underheat
we can't underheat
you can't underheat
they can't underheat 	I can't be underheating
you can't be underheating
he can't be underheating
we can't be underheating
you can't be underheating
they can't be underheating	I can't have underheated
you can't have underheated
he can't have underheated
we can't have underheated
you can't have underheated
they can't have underheated	I can't have been underheating
you can't have been underheating
he can't have been underheating
we can't have been underheating
you can't have been underheating
they can't have been underheating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I underheat?
can you underheat?
can he underheat?
can we underheat?
can you underheat?
can they underheat? 	can I be underheating?
can you be underheating?
can he be underheating?
can we be underheating?
can you be underheating?
can they be underheating? 	can I have underheated?
can you have underheated?
can he have underheated?
can we have underheated?
can you have underheated?
can they have underheated? 	can I have been underheating?
can you have been underheating?
can he have been underheating?
can we have been underheating?
can you have been underheating?
can they have been underheating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I underheat?
can't you underheat?
can't he underheat?
can't we underheat?
can't you underheat?
can't they underheat? 	can't I be underheating?
can't you be underheating?
can't he be underheating?
can't we be underheating?
can't you be underheating?
can't they be underheating? 	can't I have underheated?
can't you have underheated?
can't he have underheated?
can't we have underheated?
can't you have underheated?
can't they have underheated? 	can't I have been underheating?
can't you have been underheating?
can't he have been underheating?
can't we have been underheating?
can't you have been underheating?
can't they have been underheating?