can collaborate
Regular verb: collaborate - collaborated- collaborated

Affirmation 	
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I can collaborate
you can collaborate
she can collaborate
we can collaborate
you can collaborate
they can collaborate 	I can be collaborating
you can be collaborating
she can be collaborating
we can be collaborating
you can be collaborating
they can be collaborating	I can have collaborated
you can have collaborated
she can have collaborated
we can have collaborated
you can have collaborated
they can have collaborated	I can have been collaborating
you can have been collaborating
she can have been collaborating
we can have been collaborating
you can have been collaborating
they can have been collaborating	

Negation 	
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I can't collaborate
you can't collaborate
she can't collaborate
we can't collaborate
you can't collaborate
they can't collaborate 	I can't be collaborating
you can't be collaborating
she can't be collaborating
we can't be collaborating
you can't be collaborating
they can't be collaborating	I can't have collaborated
you can't have collaborated
she can't have collaborated
we can't have collaborated
you can't have collaborated
they can't have collaborated	I can't have been collaborating
you can't have been collaborating
she can't have been collaborating
we can't have been collaborating
you can't have been collaborating
they can't have been collaborating	

Interrogative form 	
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can I collaborate?
can you collaborate?
can she collaborate?
can we collaborate?
can you collaborate?
can they collaborate? 	can I be collaborating?
can you be collaborating?
can she be collaborating?
can we be collaborating?
can you be collaborating?
can they be collaborating? 	can I have collaborated?
can you have collaborated?
can she have collaborated?
can we have collaborated?
can you have collaborated?
can they have collaborated? 	can I have been collaborating?
can you have been collaborating?
can she have been collaborating?
can we have been collaborating?
can you have been collaborating?
can they have been collaborating? 	

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