English verb conjugation
CAN TREPHINE

Regular verb: trephine - trephined - trephined

Affirmation

Simple form	V-ing form
I can trephine you can trephine he can trephine we can trephine you can trephine they can trephine	I can be trephining you can be trephining he can be trephining we can be trephining you can be trephining they can be trephining
Perfect	V-ing perfect
I can have trephined you can have trephined he can have trephined we can have trephined you can have trephined they can have trephined	I can have been trephining you can have been trephining he can have been trephining we can have been trephining you can have been trephining they can have been trephining

Negation

Simple form	V-ing form
I can't trephine you can't trephine he can't trephine we can't trephine you can't trephine they can't trephine	I can't be trephining you can't be trephining he can't be trephining we can't be trephining you can't be trephining they can't be trephining
Perfect	V-ing perfect
I can't have trephined you can't have trephined he can't have trephined we can't have trephined you can't have trephined they can't have trephined	I can't have been trephining you can't have been trephining he can't have been trephining we can't have been trephining you can't have been trephining they can't have been trephining

Interrogative form

Simple form	V-ing form
can I trephine? can you trephine? can he trephine? can we trephine? can you trephine? can they trephine?	can I be trephining? can you be trephining? can he be trephining? can we be trephining? can you be trephining? can they be trephining?
Perfect	V-ing perfect
can I have trephined? can you have trephined? can he have trephined? can we have trephined? can you have trephined? can they have trephined?	can I have been trephining? can you have been trephining? can he have been trephining? can we have been trephining? can you have been trephining? can they have been trephining?

Interro-negative form

Simple form	V-ing form
can't I trephine? can't you trephine? can't he trephine? can't we trephine? can't you trephine? can't they trephine?	can't I be trephining? can't you be trephining? can't he be trephining? can't we be trephining? can't you be trephining? can't they be trephining?
Perfect	V-ing perfect
can't I have trephined? can't you have trephined? can't he have trephined? can't we have trephined? can't you have trephined? can't they have trephined?	can't I have been trephining? can't you have been trephining? can't he have been trephining? can't we have been trephining? can't you have been trephining? can't they have been trephining?