English verb conjugation
CAN DECODE

Regular verb: decode - decoded - decoded

Affirmation

Simple form	V-ing form
I can decode you can decode he can decode we can decode you can decode they can decode	I can be decoding you can be decoding he can be decoding we can be decoding you can be decoding they can be decoding
Perfect	V-ing perfect
I can have decoded you can have decoded he can have decoded we can have decoded you can have decoded they can have decoded	I can have been decoding you can have been decoding he can have been decoding we can have been decoding you can have been decoding they can have been decoding

Negation

Simple form	V-ing form
I cannot decode you cannot decode he cannot decode we cannot decode you cannot decode they cannot decode	I cannot be decoding you cannot be decoding he cannot be decoding we cannot be decoding you cannot be decoding they cannot be decoding
Perfect	V-ing perfect
I cannot have decoded you cannot have decoded he cannot have decoded we cannot have decoded you cannot have decoded they cannot have decoded	I cannot have been decoding you cannot have been decoding he cannot have been decoding we cannot have been decoding you cannot have been decoding they cannot have been decoding

Interrogative form

Simple form	V-ing form
can I decode? can you decode? can he decode? can we decode? can you decode? can they decode?	can I be decoding? can you be decoding? can he be decoding? can we be decoding? can you be decoding? can they be decoding?
Perfect	V-ing perfect
can I have decoded? can you have decoded? can he have decoded? can we have decoded? can you have decoded? can they have decoded?	can I have been decoding? can you have been decoding? can he have been decoding? can we have been decoding? can you have been decoding? can they have been decoding?

Interro-negative form

Simple form	V-ing form
can I not decode? can you not decode? can he not decode? can we not decode? can you not decode? can they not decode?	can I not be decoding? can you not be decoding? can he not be decoding? can we not be decoding? can you not be decoding? can they not be decoding?
Perfect	V-ing perfect
can I not have decoded? can you not have decoded? can he not have decoded? can we not have decoded? can you not have decoded? can they not have decoded?	can I not have been decoding? can you not have been decoding? can he not have been decoding? can we not have been decoding? can you not have been decoding? can they not have been decoding?