Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I could decipher decode you could decipher decode she could decipher decode we could decipher decode you could decipher decode they could decipher decode
V-ing form
I could be decipher decoding you could be decipher decoding she could be decipher decoding we could be decipher decoding you could be decipher decoding they could be decipher decoding
Perfect
I could have decipher decoded you could have decipher decoded she could have decipher decoded we could have decipher decoded you could have decipher decoded they could have decipher decoded
V-ing perfect
I could have been decipher decoding you could have been decipher decoding she could have been decipher decoding we could have been decipher decoding you could have been decipher decoding they could have been decipher decoding
Negation
Simple form
I couldn't decipher decode you couldn't decipher decode she couldn't decipher decode we couldn't decipher decode you couldn't decipher decode they couldn't decipher decode
V-ing form
I couldn't be decipher decoding you couldn't be decipher decoding she couldn't be decipher decoding we couldn't be decipher decoding you couldn't be decipher decoding they couldn't be decipher decoding
Perfect
I couldn't have decipher decoded you couldn't have decipher decoded she couldn't have decipher decoded we couldn't have decipher decoded you couldn't have decipher decoded they couldn't have decipher decoded
V-ing perfect
I couldn't have been decipher decoding you couldn't have been decipher decoding she couldn't have been decipher decoding we couldn't have been decipher decoding you couldn't have been decipher decoding they couldn't have been decipher decoding
Interrogative form
Simple form
could I decipher decode? could you decipher decode? could she decipher decode? could we decipher decode? could you decipher decode? could they decipher decode?
V-ing form
could I be decipher decoding? could you be decipher decoding? could she be decipher decoding? could we be decipher decoding? could you be decipher decoding? could they be decipher decoding?
Perfect
could I have decipher decoded? could you have decipher decoded? could she have decipher decoded? could we have decipher decoded? could you have decipher decoded? could they have decipher decoded?
V-ing perfect
could I have been decipher decoding? could you have been decipher decoding? could she have been decipher decoding? could we have been decipher decoding? could you have been decipher decoding? could they have been decipher decoding?
Interro-negative form
Simple form
couldn't I decipher decode? couldn't you decipher decode? couldn't she decipher decode? couldn't we decipher decode? couldn't you decipher decode? couldn't they decipher decode?
V-ing form
couldn't I be decipher decoding? couldn't you be decipher decoding? couldn't she be decipher decoding? couldn't we be decipher decoding? couldn't you be decipher decoding? couldn't they be decipher decoding?
Perfect
couldn't I have decipher decoded? couldn't you have decipher decoded? couldn't she have decipher decoded? couldn't we have decipher decoded? couldn't you have decipher decoded? couldn't they have decipher decoded?
V-ing perfect
couldn't I have been decipher decoding? couldn't you have been decipher decoding? couldn't she have been decipher decoding? couldn't we have been decipher decoding? couldn't you have been decipher decoding? couldn't they have been decipher decoding?