English verb conjugation
SHOULD INTERFACE

Regular verb: interface - interfaced - interfaced

Affirmation

Simple form	V-ing form
I'd interface you'd interface he'd interface we'd interface you'd interface they'd interface	I'd be interfacing you'd be interfacing he'd be interfacing we'd be interfacing you'd be interfacing they'd be interfacing
Perfect	V-ing perfect
I should've interfaced you should've interfaced he should've interfaced we should've interfaced you should've interfaced they should've interfaced	I should've been interfacing you should've been interfacing he should've been interfacing we should've been interfacing you should've been interfacing they should've been interfacing

Negation

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

Interrogative form

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

Interro-negative form

Simple form	V-ing form
shouldn't I interface? shouldn't you interface? shouldn't he interface? shouldn't we interface? shouldn't you interface? shouldn't they interface?	shouldn't I be interfacing? shouldn't you be interfacing? shouldn't he be interfacing? shouldn't we be interfacing? shouldn't you be interfacing? shouldn't they be interfacing?
Perfect	V-ing perfect
shouldn't I have interfaced? shouldn't you have interfaced? shouldn't he have interfaced? shouldn't we have interfaced? shouldn't you have interfaced? shouldn't they have interfaced?	shouldn't I have been interfacing? shouldn't you have been interfacing? shouldn't he have been interfacing? shouldn't we have been interfacing? shouldn't you have been interfacing? shouldn't they have been interfacing?