I'd be cracking you'd be cracking she'd be cracking we'd be cracking you'd be cracking they'd be cracking
Perfect
I should've cracked you should've cracked she should've cracked we should've cracked you should've cracked they should've cracked
V-ing perfect
I should've been cracking you should've been cracking she should've been cracking we should've been cracking you should've been cracking they should've been cracking
Negation
Simple form
I shouldn't crack you shouldn't crack she shouldn't crack we shouldn't crack you shouldn't crack they shouldn't crack
V-ing form
I shouldn't be cracking you shouldn't be cracking she shouldn't be cracking we shouldn't be cracking you shouldn't be cracking they shouldn't be cracking
Perfect
I shouldn't have cracked you shouldn't have cracked she shouldn't have cracked we shouldn't have cracked you shouldn't have cracked they shouldn't have cracked
V-ing perfect
I shouldn't have been cracking you shouldn't have been cracking she shouldn't have been cracking we shouldn't have been cracking you shouldn't have been cracking they shouldn't have been cracking
Interrogative form
Simple form
should I crack? should you crack? should she crack? should we crack? should you crack? should they crack?
V-ing form
should I be cracking? should you be cracking? should she be cracking? should we be cracking? should you be cracking? should they be cracking?
Perfect
should I have cracked? should you have cracked? should she have cracked? should we have cracked? should you have cracked? should they have cracked?
V-ing perfect
should I have been cracking? should you have been cracking? should she have been cracking? should we have been cracking? should you have been cracking? should they have been cracking?
Interro-negative form
Simple form
shouldn't I crack? shouldn't you crack? shouldn't she crack? shouldn't we crack? shouldn't you crack? shouldn't they crack?
V-ing form
shouldn't I be cracking? shouldn't you be cracking? shouldn't she be cracking? shouldn't we be cracking? shouldn't you be cracking? shouldn't they be cracking?
Perfect
shouldn't I have cracked? shouldn't you have cracked? shouldn't she have cracked? shouldn't we have cracked? shouldn't you have cracked? shouldn't they have cracked?
V-ing perfect
shouldn't I have been cracking? shouldn't you have been cracking? shouldn't she have been cracking? shouldn't we have been cracking? shouldn't you have been cracking? shouldn't they have been cracking?