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