I'd be fighting you'd be fighting he'd be fighting we'd be fighting you'd be fighting they'd be fighting
Perfect
I should've fought you should've fought he should've fought we should've fought you should've fought they should've fought
V-ing perfect
I should've been fighting you should've been fighting he should've been fighting we should've been fighting you should've been fighting they should've been fighting
Negation
Simple form
I shouldn't fight you shouldn't fight he shouldn't fight we shouldn't fight you shouldn't fight they shouldn't fight
V-ing form
I shouldn't be fighting you shouldn't be fighting he shouldn't be fighting we shouldn't be fighting you shouldn't be fighting they shouldn't be fighting
Perfect
I shouldn't have fought you shouldn't have fought he shouldn't have fought we shouldn't have fought you shouldn't have fought they shouldn't have fought
V-ing perfect
I shouldn't have been fighting you shouldn't have been fighting he shouldn't have been fighting we shouldn't have been fighting you shouldn't have been fighting they shouldn't have been fighting
Interrogative form
Simple form
should I fight? should you fight? should he fight? should we fight? should you fight? should they fight?
V-ing form
should I be fighting? should you be fighting? should he be fighting? should we be fighting? should you be fighting? should they be fighting?
Perfect
should I have fought? should you have fought? should he have fought? should we have fought? should you have fought? should they have fought?
V-ing perfect
should I have been fighting? should you have been fighting? should he have been fighting? should we have been fighting? should you have been fighting? should they have been fighting?
Interro-negative form
Simple form
shouldn't I fight? shouldn't you fight? shouldn't he fight? shouldn't we fight? shouldn't you fight? shouldn't they fight?
V-ing form
shouldn't I be fighting? shouldn't you be fighting? shouldn't he be fighting? shouldn't we be fighting? shouldn't you be fighting? shouldn't they be fighting?
Perfect
shouldn't I have fought? shouldn't you have fought? shouldn't he have fought? shouldn't we have fought? shouldn't you have fought? shouldn't they have fought?
V-ing perfect
shouldn't I have been fighting? shouldn't you have been fighting? shouldn't he have been fighting? shouldn't we have been fighting? shouldn't you have been fighting? shouldn't they have been fighting?