can underheat
Regular verb: underheat - underheated- underheated

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