could mainstream
Regular verb: mainstream - mainstreamed- mainstreamed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could mainstream
you could mainstream
she could mainstream
we could mainstream
you could mainstream
they could mainstream 	I could be mainstreaming
you could be mainstreaming
she could be mainstreaming
we could be mainstreaming
you could be mainstreaming
they could be mainstreaming	I could have mainstreamed
you could have mainstreamed
she could have mainstreamed
we could have mainstreamed
you could have mainstreamed
they could have mainstreamed	I could have been mainstreaming
you could have been mainstreaming
she could have been mainstreaming
we could have been mainstreaming
you could have been mainstreaming
they could have been mainstreaming	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't mainstream
you couldn't mainstream
she couldn't mainstream
we couldn't mainstream
you couldn't mainstream
they couldn't mainstream 	I couldn't be mainstreaming
you couldn't be mainstreaming
she couldn't be mainstreaming
we couldn't be mainstreaming
you couldn't be mainstreaming
they couldn't be mainstreaming	I couldn't have mainstreamed
you couldn't have mainstreamed
she couldn't have mainstreamed
we couldn't have mainstreamed
you couldn't have mainstreamed
they couldn't have mainstreamed	I couldn't have been mainstreaming
you couldn't have been mainstreaming
she couldn't have been mainstreaming
we couldn't have been mainstreaming
you couldn't have been mainstreaming
they couldn't have been mainstreaming	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I mainstream?
could you mainstream?
could she mainstream?
could we mainstream?
could you mainstream?
could they mainstream? 	could I be mainstreaming?
could you be mainstreaming?
could she be mainstreaming?
could we be mainstreaming?
could you be mainstreaming?
could they be mainstreaming? 	could I have mainstreamed?
could you have mainstreamed?
could she have mainstreamed?
could we have mainstreamed?
could you have mainstreamed?
could they have mainstreamed? 	could I have been mainstreaming?
could you have been mainstreaming?
could she have been mainstreaming?
could we have been mainstreaming?
could you have been mainstreaming?
could they have been mainstreaming? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I mainstream?
couldn't you mainstream?
couldn't she mainstream?
couldn't we mainstream?
couldn't you mainstream?
couldn't they mainstream? 	couldn't I be mainstreaming?
couldn't you be mainstreaming?
couldn't she be mainstreaming?
couldn't we be mainstreaming?
couldn't you be mainstreaming?
couldn't they be mainstreaming? 	couldn't I have mainstreamed?
couldn't you have mainstreamed?
couldn't she have mainstreamed?
couldn't we have mainstreamed?
couldn't you have mainstreamed?
couldn't they have mainstreamed? 	couldn't I have been mainstreaming?
couldn't you have been mainstreaming?
couldn't she have been mainstreaming?
couldn't we have been mainstreaming?
couldn't you have been mainstreaming?
couldn't they have been mainstreaming?