I can countersink you can countersink he can countersink we can countersink you can countersink they can countersink
V-ing form
I can be countersinking you can be countersinking he can be countersinking we can be countersinking you can be countersinking they can be countersinking
Perfect
I can have countersunk you can have countersunk he can have countersunk we can have countersunk you can have countersunk they can have countersunk
V-ing perfect
I can have been countersinking you can have been countersinking he can have been countersinking we can have been countersinking you can have been countersinking they can have been countersinking
Negation
Simple form
I can't countersink you can't countersink he can't countersink we can't countersink you can't countersink they can't countersink
V-ing form
I can't be countersinking you can't be countersinking he can't be countersinking we can't be countersinking you can't be countersinking they can't be countersinking
Perfect
I can't have countersunk you can't have countersunk he can't have countersunk we can't have countersunk you can't have countersunk they can't have countersunk
V-ing perfect
I can't have been countersinking you can't have been countersinking he can't have been countersinking we can't have been countersinking you can't have been countersinking they can't have been countersinking
Interrogative form
Simple form
can I countersink? can you countersink? can he countersink? can we countersink? can you countersink? can they countersink?
V-ing form
can I be countersinking? can you be countersinking? can he be countersinking? can we be countersinking? can you be countersinking? can they be countersinking?
Perfect
can I have countersunk? can you have countersunk? can he have countersunk? can we have countersunk? can you have countersunk? can they have countersunk?
V-ing perfect
can I have been countersinking? can you have been countersinking? can he have been countersinking? can we have been countersinking? can you have been countersinking? can they have been countersinking?
Interro-negative form
Simple form
can't I countersink? can't you countersink? can't he countersink? can't we countersink? can't you countersink? can't they countersink?
V-ing form
can't I be countersinking? can't you be countersinking? can't he be countersinking? can't we be countersinking? can't you be countersinking? can't they be countersinking?
Perfect
can't I have countersunk? can't you have countersunk? can't he have countersunk? can't we have countersunk? can't you have countersunk? can't they have countersunk?
V-ing perfect
can't I have been countersinking? can't you have been countersinking? can't he have been countersinking? can't we have been countersinking? can't you have been countersinking? can't they have been countersinking?