can lament
Regular verb: lament - lamented- lamented

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can lament
you can lament
she can lament
we can lament
you can lament
they can lament 	I can be lamenting
you can be lamenting
she can be lamenting
we can be lamenting
you can be lamenting
they can be lamenting	I can have lamented
you can have lamented
she can have lamented
we can have lamented
you can have lamented
they can have lamented	I can have been lamenting
you can have been lamenting
she can have been lamenting
we can have been lamenting
you can have been lamenting
they can have been lamenting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't lament
you can't lament
she can't lament
we can't lament
you can't lament
they can't lament 	I can't be lamenting
you can't be lamenting
she can't be lamenting
we can't be lamenting
you can't be lamenting
they can't be lamenting	I can't have lamented
you can't have lamented
she can't have lamented
we can't have lamented
you can't have lamented
they can't have lamented	I can't have been lamenting
you can't have been lamenting
she can't have been lamenting
we can't have been lamenting
you can't have been lamenting
they can't have been lamenting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I lament?
can you lament?
can she lament?
can we lament?
can you lament?
can they lament? 	can I be lamenting?
can you be lamenting?
can she be lamenting?
can we be lamenting?
can you be lamenting?
can they be lamenting? 	can I have lamented?
can you have lamented?
can she have lamented?
can we have lamented?
can you have lamented?
can they have lamented? 	can I have been lamenting?
can you have been lamenting?
can she have been lamenting?
can we have been lamenting?
can you have been lamenting?
can they have been lamenting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I lament?
can't you lament?
can't she lament?
can't we lament?
can't you lament?
can't they lament? 	can't I be lamenting?
can't you be lamenting?
can't she be lamenting?
can't we be lamenting?
can't you be lamenting?
can't they be lamenting? 	can't I have lamented?
can't you have lamented?
can't she have lamented?
can't we have lamented?
can't you have lamented?
can't they have lamented? 	can't I have been lamenting?
can't you have been lamenting?
can't she have been lamenting?
can't we have been lamenting?
can't you have been lamenting?
can't they have been lamenting?