could upstart
Regular verb: upstart - upstarted- upstarted

Affirmation 	
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I could upstart
you could upstart
she could upstart
we could upstart
you could upstart
they could upstart 	I could be upstarting
you could be upstarting
she could be upstarting
we could be upstarting
you could be upstarting
they could be upstarting	I could have upstarted
you could have upstarted
she could have upstarted
we could have upstarted
you could have upstarted
they could have upstarted	I could have been upstarting
you could have been upstarting
she could have been upstarting
we could have been upstarting
you could have been upstarting
they could have been upstarting	

Negation 	
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I couldn't upstart
you couldn't upstart
she couldn't upstart
we couldn't upstart
you couldn't upstart
they couldn't upstart 	I couldn't be upstarting
you couldn't be upstarting
she couldn't be upstarting
we couldn't be upstarting
you couldn't be upstarting
they couldn't be upstarting	I couldn't have upstarted
you couldn't have upstarted
she couldn't have upstarted
we couldn't have upstarted
you couldn't have upstarted
they couldn't have upstarted	I couldn't have been upstarting
you couldn't have been upstarting
she couldn't have been upstarting
we couldn't have been upstarting
you couldn't have been upstarting
they couldn't have been upstarting	

Interrogative form 	
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could I upstart?
could you upstart?
could she upstart?
could we upstart?
could you upstart?
could they upstart? 	could I be upstarting?
could you be upstarting?
could she be upstarting?
could we be upstarting?
could you be upstarting?
could they be upstarting? 	could I have upstarted?
could you have upstarted?
could she have upstarted?
could we have upstarted?
could you have upstarted?
could they have upstarted? 	could I have been upstarting?
could you have been upstarting?
could she have been upstarting?
could we have been upstarting?
could you have been upstarting?
could they have been upstarting? 	

Interro-negative form 	
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couldn't I upstart?
couldn't you upstart?
couldn't she upstart?
couldn't we upstart?
couldn't you upstart?
couldn't they upstart? 	couldn't I be upstarting?
couldn't you be upstarting?
couldn't she be upstarting?
couldn't we be upstarting?
couldn't you be upstarting?
couldn't they be upstarting? 	couldn't I have upstarted?
couldn't you have upstarted?
couldn't she have upstarted?
couldn't we have upstarted?
couldn't you have upstarted?
couldn't they have upstarted? 	couldn't I have been upstarting?
couldn't you have been upstarting?
couldn't she have been upstarting?
couldn't we have been upstarting?
couldn't you have been upstarting?
couldn't they have been upstarting?