English verb conjugation
SHOULD HOWL

Regular verb: howl - howled - howled

Affirmation

Simple form	V-ing form
I'd howl you'd howl he'd howl we'd howl you'd howl they'd howl	I'd be howling you'd be howling he'd be howling we'd be howling you'd be howling they'd be howling
Perfect	V-ing perfect
I should've howled you should've howled he should've howled we should've howled you should've howled they should've howled	I should've been howling you should've been howling he should've been howling we should've been howling you should've been howling they should've been howling

Negation

Simple form	V-ing form
I shouldn't howl you shouldn't howl he shouldn't howl we shouldn't howl you shouldn't howl they shouldn't howl	I shouldn't be howling you shouldn't be howling he shouldn't be howling we shouldn't be howling you shouldn't be howling they shouldn't be howling
Perfect	V-ing perfect
I shouldn't have howled you shouldn't have howled he shouldn't have howled we shouldn't have howled you shouldn't have howled they shouldn't have howled	I shouldn't have been howling you shouldn't have been howling he shouldn't have been howling we shouldn't have been howling you shouldn't have been howling they shouldn't have been howling

Interrogative form

Simple form	V-ing form
should I howl? should you howl? should he howl? should we howl? should you howl? should they howl?	should I be howling? should you be howling? should he be howling? should we be howling? should you be howling? should they be howling?
Perfect	V-ing perfect
should I have howled? should you have howled? should he have howled? should we have howled? should you have howled? should they have howled?	should I have been howling? should you have been howling? should he have been howling? should we have been howling? should you have been howling? should they have been howling?

Interro-negative form

Simple form	V-ing form
shouldn't I howl? shouldn't you howl? shouldn't he howl? shouldn't we howl? shouldn't you howl? shouldn't they howl?	shouldn't I be howling? shouldn't you be howling? shouldn't he be howling? shouldn't we be howling? shouldn't you be howling? shouldn't they be howling?
Perfect	V-ing perfect
shouldn't I have howled? shouldn't you have howled? shouldn't he have howled? shouldn't we have howled? shouldn't you have howled? shouldn't they have howled?	shouldn't I have been howling? shouldn't you have been howling? shouldn't he have been howling? shouldn't we have been howling? shouldn't you have been howling? shouldn't they have been howling?