English verb conjugation
CAN RETROFIRE

Regular verb: retrofire - retrofired - retrofired

Affirmation

Simple form	V-ing form
I can retrofire you can retrofire he can retrofire we can retrofire you can retrofire they can retrofire	I can be retrofiring you can be retrofiring he can be retrofiring we can be retrofiring you can be retrofiring they can be retrofiring
Perfect	V-ing perfect
I can have retrofired you can have retrofired he can have retrofired we can have retrofired you can have retrofired they can have retrofired	I can have been retrofiring you can have been retrofiring he can have been retrofiring we can have been retrofiring you can have been retrofiring they can have been retrofiring

Negation

Simple form	V-ing form
I cannot retrofire you cannot retrofire he cannot retrofire we cannot retrofire you cannot retrofire they cannot retrofire	I cannot be retrofiring you cannot be retrofiring he cannot be retrofiring we cannot be retrofiring you cannot be retrofiring they cannot be retrofiring
Perfect	V-ing perfect
I cannot have retrofired you cannot have retrofired he cannot have retrofired we cannot have retrofired you cannot have retrofired they cannot have retrofired	I cannot have been retrofiring you cannot have been retrofiring he cannot have been retrofiring we cannot have been retrofiring you cannot have been retrofiring they cannot have been retrofiring

Interrogative form

Simple form	V-ing form
can I retrofire? can you retrofire? can he retrofire? can we retrofire? can you retrofire? can they retrofire?	can I be retrofiring? can you be retrofiring? can he be retrofiring? can we be retrofiring? can you be retrofiring? can they be retrofiring?
Perfect	V-ing perfect
can I have retrofired? can you have retrofired? can he have retrofired? can we have retrofired? can you have retrofired? can they have retrofired?	can I have been retrofiring? can you have been retrofiring? can he have been retrofiring? can we have been retrofiring? can you have been retrofiring? can they have been retrofiring?

Interro-negative form

Simple form	V-ing form
can I not retrofire? can you not retrofire? can he not retrofire? can we not retrofire? can you not retrofire? can they not retrofire?	can I not be retrofiring? can you not be retrofiring? can he not be retrofiring? can we not be retrofiring? can you not be retrofiring? can they not be retrofiring?
Perfect	V-ing perfect
can I not have retrofired? can you not have retrofired? can he not have retrofired? can we not have retrofired? can you not have retrofired? can they not have retrofired?	can I not have been retrofiring? can you not have been retrofiring? can he not have been retrofiring? can we not have been retrofiring? can you not have been retrofiring? can they not have been retrofiring?