can overestimate
Regular verb: overestimate - overestimated- overestimated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can overestimate
you can overestimate
he can overestimate
we can overestimate
you can overestimate
they can overestimate 	I can be overestimating
you can be overestimating
he can be overestimating
we can be overestimating
you can be overestimating
they can be overestimating	I can have overestimated
you can have overestimated
he can have overestimated
we can have overestimated
you can have overestimated
they can have overestimated	I can have been overestimating
you can have been overestimating
he can have been overestimating
we can have been overestimating
you can have been overestimating
they can have been overestimating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't overestimate
you can't overestimate
he can't overestimate
we can't overestimate
you can't overestimate
they can't overestimate 	I can't be overestimating
you can't be overestimating
he can't be overestimating
we can't be overestimating
you can't be overestimating
they can't be overestimating	I can't have overestimated
you can't have overestimated
he can't have overestimated
we can't have overestimated
you can't have overestimated
they can't have overestimated	I can't have been overestimating
you can't have been overestimating
he can't have been overestimating
we can't have been overestimating
you can't have been overestimating
they can't have been overestimating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I overestimate?
can you overestimate?
can he overestimate?
can we overestimate?
can you overestimate?
can they overestimate? 	can I be overestimating?
can you be overestimating?
can he be overestimating?
can we be overestimating?
can you be overestimating?
can they be overestimating? 	can I have overestimated?
can you have overestimated?
can he have overestimated?
can we have overestimated?
can you have overestimated?
can they have overestimated? 	can I have been overestimating?
can you have been overestimating?
can he have been overestimating?
can we have been overestimating?
can you have been overestimating?
can they have been overestimating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I overestimate?
can't you overestimate?
can't he overestimate?
can't we overestimate?
can't you overestimate?
can't they overestimate? 	can't I be overestimating?
can't you be overestimating?
can't he be overestimating?
can't we be overestimating?
can't you be overestimating?
can't they be overestimating? 	can't I have overestimated?
can't you have overestimated?
can't he have overestimated?
can't we have overestimated?
can't you have overestimated?
can't they have overestimated? 	can't I have been overestimating?
can't you have been overestimating?
can't he have been overestimating?
can't we have been overestimating?
can't you have been overestimating?
can't they have been overestimating?