I'd be cracking you'd be cracking he'd be cracking we'd be cracking you'd be cracking they'd be cracking
Perfect
I should've cracked you should've cracked he 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 he 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 he 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 he 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 he 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 he 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 he crack? should we crack? should you crack? should they crack?
V-ing form
should I be cracking? should you be cracking? should he be cracking? should we be cracking? should you be cracking? should they be cracking?
Perfect
should I have cracked? should you have cracked? should he 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 he 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 he 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 he 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 he 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 he have been cracking? shouldn't we have been cracking? shouldn't you have been cracking? shouldn't they have been cracking?