I can elapse you can elapse he can elapse we can elapse you can elapse they can elapse
V-ing form
I can be elapsing you can be elapsing he can be elapsing we can be elapsing you can be elapsing they can be elapsing
Perfect
I can have elapsed you can have elapsed he 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 he 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 he 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 he 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 he 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 he 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 he elapse? can we elapse? can you elapse? can they elapse?
V-ing form
can I be elapsing? can you be elapsing? can he be elapsing? can we be elapsing? can you be elapsing? can they be elapsing?
Perfect
can I have elapsed? can you have elapsed? can he 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 he 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 he 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 he 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 he 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 he have been elapsing? can't we have been elapsing? can't you have been elapsing? can't they have been elapsing?