I should retrofit you should retrofit he should retrofit we should retrofit you should retrofit they should retrofit
V-ing form
I should be retrofiting you should be retrofiting he should be retrofiting we should be retrofiting you should be retrofiting they should be retrofiting
Perfect
I should have retrofit you should have retrofit he should have retrofit we should have retrofit you should have retrofit they should have retrofit
V-ing perfect
I should have been retrofiting you should have been retrofiting he should have been retrofiting we should have been retrofiting you should have been retrofiting they should have been retrofiting
Negation
Simple form
I should not retrofit you should not retrofit he should not retrofit we should not retrofit you should not retrofit they should not retrofit
V-ing form
I should not be retrofiting you should not be retrofiting he should not be retrofiting we should not be retrofiting you should not be retrofiting they should not be retrofiting
Perfect
I should not have retrofit you should not have retrofit he should not have retrofit we should not have retrofit you should not have retrofit they should not have retrofit
V-ing perfect
I should not have been retrofiting you should not have been retrofiting he should not have been retrofiting we should not have been retrofiting you should not have been retrofiting they should not 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
should I not retrofit? should you not retrofit? should he not retrofit? should we not retrofit? should you not retrofit? should they not retrofit?
V-ing form
should I not be retrofiting? should you not be retrofiting? should he not be retrofiting? should we not be retrofiting? should you not be retrofiting? should they not be retrofiting?
Perfect
should I not have retrofit? should you not have retrofit? should he not have retrofit? should we not have retrofit? should you not have retrofit? should they not have retrofit?
V-ing perfect
should I not have been retrofiting? should you not have been retrofiting? should he not have been retrofiting? should we not have been retrofiting? should you not have been retrofiting? should they not have been retrofiting?