English verb conjugation
SHOULD SKI

Regular verb: ski - skied - skied

Affirmation

Simple form	V-ing form
I'd ski you'd ski he'd ski we'd ski you'd ski they'd ski	I'd be skiing you'd be skiing he'd be skiing we'd be skiing you'd be skiing they'd be skiing
Perfect	V-ing perfect
I should've skied you should've skied he should've skied we should've skied you should've skied they should've skied	I should've been skiing you should've been skiing he should've been skiing we should've been skiing you should've been skiing they should've been skiing

Negation

Simple form	V-ing form
I shouldn't ski you shouldn't ski he shouldn't ski we shouldn't ski you shouldn't ski they shouldn't ski	I shouldn't be skiing you shouldn't be skiing he shouldn't be skiing we shouldn't be skiing you shouldn't be skiing they shouldn't be skiing
Perfect	V-ing perfect
I shouldn't have skied you shouldn't have skied he shouldn't have skied we shouldn't have skied you shouldn't have skied they shouldn't have skied	I shouldn't have been skiing you shouldn't have been skiing he shouldn't have been skiing we shouldn't have been skiing you shouldn't have been skiing they shouldn't have been skiing

Interrogative form

Simple form	V-ing form
should I ski? should you ski? should he ski? should we ski? should you ski? should they ski?	should I be skiing? should you be skiing? should he be skiing? should we be skiing? should you be skiing? should they be skiing?
Perfect	V-ing perfect
should I have skied? should you have skied? should he have skied? should we have skied? should you have skied? should they have skied?	should I have been skiing? should you have been skiing? should he have been skiing? should we have been skiing? should you have been skiing? should they have been skiing?

Interro-negative form

Simple form	V-ing form
shouldn't I ski? shouldn't you ski? shouldn't he ski? shouldn't we ski? shouldn't you ski? shouldn't they ski?	shouldn't I be skiing? shouldn't you be skiing? shouldn't he be skiing? shouldn't we be skiing? shouldn't you be skiing? shouldn't they be skiing?
Perfect	V-ing perfect
shouldn't I have skied? shouldn't you have skied? shouldn't he have skied? shouldn't we have skied? shouldn't you have skied? shouldn't they have skied?	shouldn't I have been skiing? shouldn't you have been skiing? shouldn't he have been skiing? shouldn't we have been skiing? shouldn't you have been skiing? shouldn't they have been skiing?