English verb conjugation
CAN INTERFACE

Regular verb: interface - interfaced - interfaced

Affirmation

Simple form	V-ing form
I can interface you can interface he can interface we can interface you can interface they can interface	I can be interfacing you can be interfacing he can be interfacing we can be interfacing you can be interfacing they can be interfacing
Perfect	V-ing perfect
I can have interfaced you can have interfaced he can have interfaced we can have interfaced you can have interfaced they can have interfaced	I can have been interfacing you can have been interfacing he can have been interfacing we can have been interfacing you can have been interfacing they can have been interfacing

Negation

Simple form	V-ing form
I cannot interface you cannot interface he cannot interface we cannot interface you cannot interface they cannot interface	I cannot be interfacing you cannot be interfacing he cannot be interfacing we cannot be interfacing you cannot be interfacing they cannot be interfacing
Perfect	V-ing perfect
I cannot have interfaced you cannot have interfaced he cannot have interfaced we cannot have interfaced you cannot have interfaced they cannot have interfaced	I cannot have been interfacing you cannot have been interfacing he cannot have been interfacing we cannot have been interfacing you cannot have been interfacing they cannot have been interfacing

Interrogative form

Simple form	V-ing form
can I interface? can you interface? can he interface? can we interface? can you interface? can they interface?	can I be interfacing? can you be interfacing? can he be interfacing? can we be interfacing? can you be interfacing? can they be interfacing?
Perfect	V-ing perfect
can I have interfaced? can you have interfaced? can he have interfaced? can we have interfaced? can you have interfaced? can they have interfaced?	can I have been interfacing? can you have been interfacing? can he have been interfacing? can we have been interfacing? can you have been interfacing? can they have been interfacing?

Interro-negative form

Simple form	V-ing form
can I not interface? can you not interface? can he not interface? can we not interface? can you not interface? can they not interface?	can I not be interfacing? can you not be interfacing? can he not be interfacing? can we not be interfacing? can you not be interfacing? can they not be interfacing?
Perfect	V-ing perfect
can I not have interfaced? can you not have interfaced? can he not have interfaced? can we not have interfaced? can you not have interfaced? can they not have interfaced?	can I not have been interfacing? can you not have been interfacing? can he not have been interfacing? can we not have been interfacing? can you not have been interfacing? can they not have been interfacing?