English verb conjugation
SHOULD INFECT

Regular verb: infect - infected - infected

Affirmation

Simple form	V-ing form
I'd infect you'd infect he'd infect we'd infect you'd infect they'd infect	I'd be infecting you'd be infecting he'd be infecting we'd be infecting you'd be infecting they'd be infecting
Perfect	V-ing perfect
I should've infected you should've infected he should've infected we should've infected you should've infected they should've infected	I should've been infecting you should've been infecting he should've been infecting we should've been infecting you should've been infecting they should've been infecting

Negation

Simple form	V-ing form
I shouldn't infect you shouldn't infect he shouldn't infect we shouldn't infect you shouldn't infect they shouldn't infect	I shouldn't be infecting you shouldn't be infecting he shouldn't be infecting we shouldn't be infecting you shouldn't be infecting they shouldn't be infecting
Perfect	V-ing perfect
I shouldn't have infected you shouldn't have infected he shouldn't have infected we shouldn't have infected you shouldn't have infected they shouldn't have infected	I shouldn't have been infecting you shouldn't have been infecting he shouldn't have been infecting we shouldn't have been infecting you shouldn't have been infecting they shouldn't have been infecting

Interrogative form

Simple form	V-ing form
should I infect? should you infect? should he infect? should we infect? should you infect? should they infect?	should I be infecting? should you be infecting? should he be infecting? should we be infecting? should you be infecting? should they be infecting?
Perfect	V-ing perfect
should I have infected? should you have infected? should he have infected? should we have infected? should you have infected? should they have infected?	should I have been infecting? should you have been infecting? should he have been infecting? should we have been infecting? should you have been infecting? should they have been infecting?

Interro-negative form

Simple form	V-ing form
shouldn't I infect? shouldn't you infect? shouldn't he infect? shouldn't we infect? shouldn't you infect? shouldn't they infect?	shouldn't I be infecting? shouldn't you be infecting? shouldn't he be infecting? shouldn't we be infecting? shouldn't you be infecting? shouldn't they be infecting?
Perfect	V-ing perfect
shouldn't I have infected? shouldn't you have infected? shouldn't he have infected? shouldn't we have infected? shouldn't you have infected? shouldn't they have infected?	shouldn't I have been infecting? shouldn't you have been infecting? shouldn't he have been infecting? shouldn't we have been infecting? shouldn't you have been infecting? shouldn't they have been infecting?