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 can't retrofit you can't retrofit he can't retrofit we can't retrofit you can't retrofit they can't retrofit	I can't be retrofiting you can't be retrofiting he can't be retrofiting we can't be retrofiting you can't be retrofiting they can't be retrofiting
Perfect	V-ing perfect
I can't have retrofit you can't have retrofit he can't have retrofit we can't have retrofit you can't have retrofit they can't have retrofit	I can't have been retrofiting you can't have been retrofiting he can't have been retrofiting we can't have been retrofiting you can't have been retrofiting they can't 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't I retrofit? can't you retrofit? can't he retrofit? can't we retrofit? can't you retrofit? can't they retrofit?	can't I be retrofiting? can't you be retrofiting? can't he be retrofiting? can't we be retrofiting? can't you be retrofiting? can't they be retrofiting?
Perfect	V-ing perfect
can't I have retrofit? can't you have retrofit? can't he have retrofit? can't we have retrofit? can't you have retrofit? can't they have retrofit?	can't I have been retrofiting? can't you have been retrofiting? can't he have been retrofiting? can't we have been retrofiting? can't you have been retrofiting? can't they have been retrofiting?