I can double-tongue you can double-tongue he can double-tongue we can double-tongue you can double-tongue they can double-tongue
V-ing form
I can be double-tonguing you can be double-tonguing he can be double-tonguing we can be double-tonguing you can be double-tonguing they can be double-tonguing
Perfect
I can have double-tongued you can have double-tongued he can have double-tongued we can have double-tongued you can have double-tongued they can have double-tongued
V-ing perfect
I can have been double-tonguing you can have been double-tonguing he can have been double-tonguing we can have been double-tonguing you can have been double-tonguing they can have been double-tonguing
Negation
Simple form
I can't double-tongue you can't double-tongue he can't double-tongue we can't double-tongue you can't double-tongue they can't double-tongue
V-ing form
I can't be double-tonguing you can't be double-tonguing he can't be double-tonguing we can't be double-tonguing you can't be double-tonguing they can't be double-tonguing
Perfect
I can't have double-tongued you can't have double-tongued he can't have double-tongued we can't have double-tongued you can't have double-tongued they can't have double-tongued
V-ing perfect
I can't have been double-tonguing you can't have been double-tonguing he can't have been double-tonguing we can't have been double-tonguing you can't have been double-tonguing they can't have been double-tonguing
Interrogative form
Simple form
can I double-tongue? can you double-tongue? can he double-tongue? can we double-tongue? can you double-tongue? can they double-tongue?
V-ing form
can I be double-tonguing? can you be double-tonguing? can he be double-tonguing? can we be double-tonguing? can you be double-tonguing? can they be double-tonguing?
Perfect
can I have double-tongued? can you have double-tongued? can he have double-tongued? can we have double-tongued? can you have double-tongued? can they have double-tongued?
V-ing perfect
can I have been double-tonguing? can you have been double-tonguing? can he have been double-tonguing? can we have been double-tonguing? can you have been double-tonguing? can they have been double-tonguing?
Interro-negative form
Simple form
can't I double-tongue? can't you double-tongue? can't he double-tongue? can't we double-tongue? can't you double-tongue? can't they double-tongue?
V-ing form
can't I be double-tonguing? can't you be double-tonguing? can't he be double-tonguing? can't we be double-tonguing? can't you be double-tonguing? can't they be double-tonguing?
Perfect
can't I have double-tongued? can't you have double-tongued? can't he have double-tongued? can't we have double-tongued? can't you have double-tongued? can't they have double-tongued?
V-ing perfect
can't I have been double-tonguing? can't you have been double-tonguing? can't he have been double-tonguing? can't we have been double-tonguing? can't you have been double-tonguing? can't they have been double-tonguing?