I can leap you can leap she can leap we can leap you can leap they can leap
V-ing form
I can be leaping you can be leaping she can be leaping we can be leaping you can be leaping they can be leaping
Perfect
I can have leapt, leaped you can have leapt, leaped she can have leapt, leaped we can have leapt, leaped you can have leapt, leaped they can have leapt, leaped
V-ing perfect
I can have been leaping you can have been leaping she can have been leaping we can have been leaping you can have been leaping they can have been leaping
Negation
Simple form
I can't leap you can't leap she can't leap we can't leap you can't leap they can't leap
V-ing form
I can't be leaping you can't be leaping she can't be leaping we can't be leaping you can't be leaping they can't be leaping
Perfect
I can't have leapt, leaped you can't have leapt, leaped she can't have leapt, leaped we can't have leapt, leaped you can't have leapt, leaped they can't have leapt, leaped
V-ing perfect
I can't have been leaping you can't have been leaping she can't have been leaping we can't have been leaping you can't have been leaping they can't have been leaping
Interrogative form
Simple form
can I leap? can you leap? can she leap? can we leap? can you leap? can they leap?
V-ing form
can I be leaping? can you be leaping? can she be leaping? can we be leaping? can you be leaping? can they be leaping?
Perfect
can I have leapt, leaped? can you have leapt, leaped? can she have leapt, leaped? can we have leapt, leaped? can you have leapt, leaped? can they have leapt, leaped?
V-ing perfect
can I have been leaping? can you have been leaping? can she have been leaping? can we have been leaping? can you have been leaping? can they have been leaping?
Interro-negative form
Simple form
can't I leap? can't you leap? can't she leap? can't we leap? can't you leap? can't they leap?
V-ing form
can't I be leaping? can't you be leaping? can't she be leaping? can't we be leaping? can't you be leaping? can't they be leaping?
Perfect
can't I have leapt, leaped? can't you have leapt, leaped? can't she have leapt, leaped? can't we have leapt, leaped? can't you have leapt, leaped? can't they have leapt, leaped?
V-ing perfect
can't I have been leaping? can't you have been leaping? can't she have been leaping? can't we have been leaping? can't you have been leaping? can't they have been leaping?