should decode
Regular verb: decode - decoded- decoded

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd decode
you'd decode
she'd decode
we'd decode
you'd decode
they'd decode 	I'd be decoding
you'd be decoding
she'd be decoding
we'd be decoding
you'd be decoding
they'd be decoding	I should've decoded
you should've decoded
she should've decoded
we should've decoded
you should've decoded
they should've decoded	I should've been decoding
you should've been decoding
she should've been decoding
we should've been decoding
you should've been decoding
they should've been decoding	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't decode
you shouldn't decode
she shouldn't decode
we shouldn't decode
you shouldn't decode
they shouldn't decode 	I shouldn't be decoding
you shouldn't be decoding
she shouldn't be decoding
we shouldn't be decoding
you shouldn't be decoding
they shouldn't be decoding	I shouldn't have decoded
you shouldn't have decoded
she shouldn't have decoded
we shouldn't have decoded
you shouldn't have decoded
they shouldn't have decoded	I shouldn't have been decoding
you shouldn't have been decoding
she shouldn't have been decoding
we shouldn't have been decoding
you shouldn't have been decoding
they shouldn't have been decoding	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I decode?
should you decode?
should she decode?
should we decode?
should you decode?
should they decode? 	should I be decoding?
should you be decoding?
should she be decoding?
should we be decoding?
should you be decoding?
should they be decoding? 	should I have decoded?
should you have decoded?
should she have decoded?
should we have decoded?
should you have decoded?
should they have decoded? 	should I have been decoding?
should you have been decoding?
should she have been decoding?
should we have been decoding?
should you have been decoding?
should they have been decoding? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I decode?
shouldn't you decode?
shouldn't she decode?
shouldn't we decode?
shouldn't you decode?
shouldn't they decode? 	shouldn't I be decoding?
shouldn't you be decoding?
shouldn't she be decoding?
shouldn't we be decoding?
shouldn't you be decoding?
shouldn't they be decoding? 	shouldn't I have decoded?
shouldn't you have decoded?
shouldn't she have decoded?
shouldn't we have decoded?
shouldn't you have decoded?
shouldn't they have decoded? 	shouldn't I have been decoding?
shouldn't you have been decoding?
shouldn't she have been decoding?
shouldn't we have been decoding?
shouldn't you have been decoding?
shouldn't they have been decoding?