should instant-message
Regular verb: instant-message - instant-messaged- instant-messaged

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd instant-message
you'd instant-message
he'd instant-message
we'd instant-message
you'd instant-message
they'd instant-message 	I'd be instant-messaging
you'd be instant-messaging
he'd be instant-messaging
we'd be instant-messaging
you'd be instant-messaging
they'd be instant-messaging	I should've instant-messaged
you should've instant-messaged
he should've instant-messaged
we should've instant-messaged
you should've instant-messaged
they should've instant-messaged	I should've been instant-messaging
you should've been instant-messaging
he should've been instant-messaging
we should've been instant-messaging
you should've been instant-messaging
they should've been instant-messaging	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't instant-message
you shouldn't instant-message
he shouldn't instant-message
we shouldn't instant-message
you shouldn't instant-message
they shouldn't instant-message 	I shouldn't be instant-messaging
you shouldn't be instant-messaging
he shouldn't be instant-messaging
we shouldn't be instant-messaging
you shouldn't be instant-messaging
they shouldn't be instant-messaging	I shouldn't have instant-messaged
you shouldn't have instant-messaged
he shouldn't have instant-messaged
we shouldn't have instant-messaged
you shouldn't have instant-messaged
they shouldn't have instant-messaged	I shouldn't have been instant-messaging
you shouldn't have been instant-messaging
he shouldn't have been instant-messaging
we shouldn't have been instant-messaging
you shouldn't have been instant-messaging
they shouldn't have been instant-messaging	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I instant-message?
should you instant-message?
should he instant-message?
should we instant-message?
should you instant-message?
should they instant-message? 	should I be instant-messaging?
should you be instant-messaging?
should he be instant-messaging?
should we be instant-messaging?
should you be instant-messaging?
should they be instant-messaging? 	should I have instant-messaged?
should you have instant-messaged?
should he have instant-messaged?
should we have instant-messaged?
should you have instant-messaged?
should they have instant-messaged? 	should I have been instant-messaging?
should you have been instant-messaging?
should he have been instant-messaging?
should we have been instant-messaging?
should you have been instant-messaging?
should they have been instant-messaging? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I instant-message?
shouldn't you instant-message?
shouldn't he instant-message?
shouldn't we instant-message?
shouldn't you instant-message?
shouldn't they instant-message? 	shouldn't I be instant-messaging?
shouldn't you be instant-messaging?
shouldn't he be instant-messaging?
shouldn't we be instant-messaging?
shouldn't you be instant-messaging?
shouldn't they be instant-messaging? 	shouldn't I have instant-messaged?
shouldn't you have instant-messaged?
shouldn't he have instant-messaged?
shouldn't we have instant-messaged?
shouldn't you have instant-messaged?
shouldn't they have instant-messaged? 	shouldn't I have been instant-messaging?
shouldn't you have been instant-messaging?
shouldn't he have been instant-messaging?
shouldn't we have been instant-messaging?
shouldn't you have been instant-messaging?
shouldn't they have been instant-messaging?