I should dig you should dig he should dig we should dig you should dig they should dig
V-ing form
I should be digging you should be digging he should be digging we should be digging you should be digging they should be digging
Perfect
I should have dug you should have dug he should have dug we should have dug you should have dug they should have dug
V-ing perfect
I should have been digging you should have been digging he should have been digging we should have been digging you should have been digging they should have been digging
Negation
Simple form
I should not dig you should not dig he should not dig we should not dig you should not dig they should not dig
V-ing form
I should not be digging you should not be digging he should not be digging we should not be digging you should not be digging they should not be digging
Perfect
I should not have dug you should not have dug he should not have dug we should not have dug you should not have dug they should not have dug
V-ing perfect
I should not have been digging you should not have been digging he should not have been digging we should not have been digging you should not have been digging they should not have been digging
Interrogative form
Simple form
should I dig? should you dig? should he dig? should we dig? should you dig? should they dig?
V-ing form
should I be digging? should you be digging? should he be digging? should we be digging? should you be digging? should they be digging?
Perfect
should I have dug? should you have dug? should he have dug? should we have dug? should you have dug? should they have dug?
V-ing perfect
should I have been digging? should you have been digging? should he have been digging? should we have been digging? should you have been digging? should they have been digging?
Interro-negative form
Simple form
should I not dig? should you not dig? should he not dig? should we not dig? should you not dig? should they not dig?
V-ing form
should I not be digging? should you not be digging? should he not be digging? should we not be digging? should you not be digging? should they not be digging?
Perfect
should I not have dug? should you not have dug? should he not have dug? should we not have dug? should you not have dug? should they not have dug?
V-ing perfect
should I not have been digging? should you not have been digging? should he not have been digging? should we not have been digging? should you not have been digging? should they not have been digging?