I should couple you should couple he should couple we should couple you should couple they should couple
V-ing form
I should be coupling you should be coupling he should be coupling we should be coupling you should be coupling they should be coupling
Perfect
I should have coupled you should have coupled he should have coupled we should have coupled you should have coupled they should have coupled
V-ing perfect
I should have been coupling you should have been coupling he should have been coupling we should have been coupling you should have been coupling they should have been coupling
Negation
Simple form
I should not couple you should not couple he should not couple we should not couple you should not couple they should not couple
V-ing form
I should not be coupling you should not be coupling he should not be coupling we should not be coupling you should not be coupling they should not be coupling
Perfect
I should not have coupled you should not have coupled he should not have coupled we should not have coupled you should not have coupled they should not have coupled
V-ing perfect
I should not have been coupling you should not have been coupling he should not have been coupling we should not have been coupling you should not have been coupling they should not have been coupling
Interrogative form
Simple form
should I couple? should you couple? should he couple? should we couple? should you couple? should they couple?
V-ing form
should I be coupling? should you be coupling? should he be coupling? should we be coupling? should you be coupling? should they be coupling?
Perfect
should I have coupled? should you have coupled? should he have coupled? should we have coupled? should you have coupled? should they have coupled?
V-ing perfect
should I have been coupling? should you have been coupling? should he have been coupling? should we have been coupling? should you have been coupling? should they have been coupling?
Interro-negative form
Simple form
should I not couple? should you not couple? should he not couple? should we not couple? should you not couple? should they not couple?
V-ing form
should I not be coupling? should you not be coupling? should he not be coupling? should we not be coupling? should you not be coupling? should they not be coupling?
Perfect
should I not have coupled? should you not have coupled? should he not have coupled? should we not have coupled? should you not have coupled? should they not have coupled?
V-ing perfect
should I not have been coupling? should you not have been coupling? should he not have been coupling? should we not have been coupling? should you not have been coupling? should they not have been coupling?