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