English verb conjugation
CAN RETROFIT

Irregular verb: retrofit - retrofit - retrofit

Affirmation

Simple form	V-ing form
I can retrofit you can retrofit he can retrofit we can retrofit you can retrofit they can retrofit	I can be retrofiting you can be retrofiting he can be retrofiting we can be retrofiting you can be retrofiting they can be retrofiting
Perfect	V-ing perfect
I can have retrofit you can have retrofit he can have retrofit we can have retrofit you can have retrofit they can have retrofit	I can have been retrofiting you can have been retrofiting he can have been retrofiting we can have been retrofiting you can have been retrofiting they can have been retrofiting

Negation

Simple form	V-ing form
I cannot retrofit you cannot retrofit he cannot retrofit we cannot retrofit you cannot retrofit they cannot retrofit	I cannot be retrofiting you cannot be retrofiting he cannot be retrofiting we cannot be retrofiting you cannot be retrofiting they cannot be retrofiting
Perfect	V-ing perfect
I cannot have retrofit you cannot have retrofit he cannot have retrofit we cannot have retrofit you cannot have retrofit they cannot have retrofit	I cannot have been retrofiting you cannot have been retrofiting he cannot have been retrofiting we cannot have been retrofiting you cannot have been retrofiting they cannot have been retrofiting

Interrogative form

Simple form	V-ing form
can I retrofit? can you retrofit? can he retrofit? can we retrofit? can you retrofit? can they retrofit?	can I be retrofiting? can you be retrofiting? can he be retrofiting? can we be retrofiting? can you be retrofiting? can they be retrofiting?
Perfect	V-ing perfect
can I have retrofit? can you have retrofit? can he have retrofit? can we have retrofit? can you have retrofit? can they have retrofit?	can I have been retrofiting? can you have been retrofiting? can he have been retrofiting? can we have been retrofiting? can you have been retrofiting? can they have been retrofiting?

Interro-negative form

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