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
I should've skied you should've skied he should've skied we should've skied you should've skied they should've skied
V-ing perfect
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
I shouldn't ski you shouldn't ski he shouldn't ski we shouldn't ski you shouldn't ski they shouldn't ski
V-ing form
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
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
V-ing perfect
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
should I ski? should you ski? should he ski? should we ski? should you ski? should they ski?
V-ing form
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
should I have skied? should you have skied? should he have skied? should we have skied? should you have skied? should they have skied?
V-ing perfect
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
shouldn't I ski? shouldn't you ski? shouldn't he ski? shouldn't we ski? shouldn't you ski? shouldn't they ski?
V-ing form
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
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?
V-ing perfect
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?