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