I can helicopter you can helicopter he can helicopter we can helicopter you can helicopter they can helicopter
V-ing form
I can be helicoptering you can be helicoptering he can be helicoptering we can be helicoptering you can be helicoptering they can be helicoptering
Perfect
I can have helicoptered you can have helicoptered he can have helicoptered we can have helicoptered you can have helicoptered they can have helicoptered
V-ing perfect
I can have been helicoptering you can have been helicoptering he can have been helicoptering we can have been helicoptering you can have been helicoptering they can have been helicoptering
Negation
Simple form
I can't helicopter you can't helicopter he can't helicopter we can't helicopter you can't helicopter they can't helicopter
V-ing form
I can't be helicoptering you can't be helicoptering he can't be helicoptering we can't be helicoptering you can't be helicoptering they can't be helicoptering
Perfect
I can't have helicoptered you can't have helicoptered he can't have helicoptered we can't have helicoptered you can't have helicoptered they can't have helicoptered
V-ing perfect
I can't have been helicoptering you can't have been helicoptering he can't have been helicoptering we can't have been helicoptering you can't have been helicoptering they can't have been helicoptering
Interrogative form
Simple form
can I helicopter? can you helicopter? can he helicopter? can we helicopter? can you helicopter? can they helicopter?
V-ing form
can I be helicoptering? can you be helicoptering? can he be helicoptering? can we be helicoptering? can you be helicoptering? can they be helicoptering?
Perfect
can I have helicoptered? can you have helicoptered? can he have helicoptered? can we have helicoptered? can you have helicoptered? can they have helicoptered?
V-ing perfect
can I have been helicoptering? can you have been helicoptering? can he have been helicoptering? can we have been helicoptering? can you have been helicoptering? can they have been helicoptering?
Interro-negative form
Simple form
can't I helicopter? can't you helicopter? can't he helicopter? can't we helicopter? can't you helicopter? can't they helicopter?
V-ing form
can't I be helicoptering? can't you be helicoptering? can't he be helicoptering? can't we be helicoptering? can't you be helicoptering? can't they be helicoptering?
Perfect
can't I have helicoptered? can't you have helicoptered? can't he have helicoptered? can't we have helicoptered? can't you have helicoptered? can't they have helicoptered?
V-ing perfect
can't I have been helicoptering? can't you have been helicoptering? can't he have been helicoptering? can't we have been helicoptering? can't you have been helicoptering? can't they have been helicoptering?