I can elapse you can elapse she can elapse we can elapse you can elapse they can elapse
V-ing form
I can be elapsing you can be elapsing she can be elapsing we can be elapsing you can be elapsing they can be elapsing
Perfect
I can have elapsed you can have elapsed she can have elapsed we can have elapsed you can have elapsed they can have elapsed
V-ing perfect
I can have been elapsing you can have been elapsing she can have been elapsing we can have been elapsing you can have been elapsing they can have been elapsing
Negation
Simple form
I can't elapse you can't elapse she can't elapse we can't elapse you can't elapse they can't elapse
V-ing form
I can't be elapsing you can't be elapsing she can't be elapsing we can't be elapsing you can't be elapsing they can't be elapsing
Perfect
I can't have elapsed you can't have elapsed she can't have elapsed we can't have elapsed you can't have elapsed they can't have elapsed
V-ing perfect
I can't have been elapsing you can't have been elapsing she can't have been elapsing we can't have been elapsing you can't have been elapsing they can't have been elapsing
Interrogative form
Simple form
can I elapse? can you elapse? can she elapse? can we elapse? can you elapse? can they elapse?
V-ing form
can I be elapsing? can you be elapsing? can she be elapsing? can we be elapsing? can you be elapsing? can they be elapsing?
Perfect
can I have elapsed? can you have elapsed? can she have elapsed? can we have elapsed? can you have elapsed? can they have elapsed?
V-ing perfect
can I have been elapsing? can you have been elapsing? can she have been elapsing? can we have been elapsing? can you have been elapsing? can they have been elapsing?
Interro-negative form
Simple form
can't I elapse? can't you elapse? can't she elapse? can't we elapse? can't you elapse? can't they elapse?
V-ing form
can't I be elapsing? can't you be elapsing? can't she be elapsing? can't we be elapsing? can't you be elapsing? can't they be elapsing?
Perfect
can't I have elapsed? can't you have elapsed? can't she have elapsed? can't we have elapsed? can't you have elapsed? can't they have elapsed?
V-ing perfect
can't I have been elapsing? can't you have been elapsing? can't she have been elapsing? can't we have been elapsing? can't you have been elapsing? can't they have been elapsing?