should collaborate
Regular verb: collaborate - collaborated- collaborated

Affirmation 	
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I'd collaborate
you'd collaborate
he'd collaborate
we'd collaborate
you'd collaborate
they'd collaborate 	I'd be collaborating
you'd be collaborating
he'd be collaborating
we'd be collaborating
you'd be collaborating
they'd be collaborating	I should've collaborated
you should've collaborated
he should've collaborated
we should've collaborated
you should've collaborated
they should've collaborated	I should've been collaborating
you should've been collaborating
he should've been collaborating
we should've been collaborating
you should've been collaborating
they should've been collaborating	

Negation 	
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I shouldn't collaborate
you shouldn't collaborate
he shouldn't collaborate
we shouldn't collaborate
you shouldn't collaborate
they shouldn't collaborate 	I shouldn't be collaborating
you shouldn't be collaborating
he shouldn't be collaborating
we shouldn't be collaborating
you shouldn't be collaborating
they shouldn't be collaborating	I shouldn't have collaborated
you shouldn't have collaborated
he shouldn't have collaborated
we shouldn't have collaborated
you shouldn't have collaborated
they shouldn't have collaborated	I shouldn't have been collaborating
you shouldn't have been collaborating
he shouldn't have been collaborating
we shouldn't have been collaborating
you shouldn't have been collaborating
they shouldn't have been collaborating	

Interrogative form 	
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should I collaborate?
should you collaborate?
should he collaborate?
should we collaborate?
should you collaborate?
should they collaborate? 	should I be collaborating?
should you be collaborating?
should he be collaborating?
should we be collaborating?
should you be collaborating?
should they be collaborating? 	should I have collaborated?
should you have collaborated?
should he have collaborated?
should we have collaborated?
should you have collaborated?
should they have collaborated? 	should I have been collaborating?
should you have been collaborating?
should he have been collaborating?
should we have been collaborating?
should you have been collaborating?
should they have been collaborating? 	

Interro-negative form 	
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shouldn't I collaborate?
shouldn't you collaborate?
shouldn't he collaborate?
shouldn't we collaborate?
shouldn't you collaborate?
shouldn't they collaborate? 	shouldn't I be collaborating?
shouldn't you be collaborating?
shouldn't he be collaborating?
shouldn't we be collaborating?
shouldn't you be collaborating?
shouldn't they be collaborating? 	shouldn't I have collaborated?
shouldn't you have collaborated?
shouldn't he have collaborated?
shouldn't we have collaborated?
shouldn't you have collaborated?
shouldn't they have collaborated? 	shouldn't I have been collaborating?
shouldn't you have been collaborating?
shouldn't he have been collaborating?
shouldn't we have been collaborating?
shouldn't you have been collaborating?
shouldn't they have been collaborating?