English verb conjugation
CAN COUNTERSINK

Irregular verb: countersink - countersank - countersunk

Affirmation

Simple form	V-ing form
I can countersink you can countersink he can countersink we can countersink you can countersink they can countersink	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	V-ing 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	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	V-ing 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	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	V-ing 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	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	V-ing form
can I countersink? can you countersink? can he countersink? can we countersink? can you countersink? can they countersink?	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	V-ing 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?	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	V-ing 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?	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	V-ing 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?	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?