could support
Regular verb: support - supported- supported

Affirmation 	
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I could support
you could support
he could support
we could support
you could support
they could support 	I could be supporting
you could be supporting
he could be supporting
we could be supporting
you could be supporting
they could be supporting	I could have supported
you could have supported
he could have supported
we could have supported
you could have supported
they could have supported	I could have been supporting
you could have been supporting
he could have been supporting
we could have been supporting
you could have been supporting
they could have been supporting	

Negation 	
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I couldn't support
you couldn't support
he couldn't support
we couldn't support
you couldn't support
they couldn't support 	I couldn't be supporting
you couldn't be supporting
he couldn't be supporting
we couldn't be supporting
you couldn't be supporting
they couldn't be supporting	I couldn't have supported
you couldn't have supported
he couldn't have supported
we couldn't have supported
you couldn't have supported
they couldn't have supported	I couldn't have been supporting
you couldn't have been supporting
he couldn't have been supporting
we couldn't have been supporting
you couldn't have been supporting
they couldn't have been supporting	

Interrogative form 	
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could I support?
could you support?
could he support?
could we support?
could you support?
could they support? 	could I be supporting?
could you be supporting?
could he be supporting?
could we be supporting?
could you be supporting?
could they be supporting? 	could I have supported?
could you have supported?
could he have supported?
could we have supported?
could you have supported?
could they have supported? 	could I have been supporting?
could you have been supporting?
could he have been supporting?
could we have been supporting?
could you have been supporting?
could they have been supporting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I support?
couldn't you support?
couldn't he support?
couldn't we support?
couldn't you support?
couldn't they support? 	couldn't I be supporting?
couldn't you be supporting?
couldn't he be supporting?
couldn't we be supporting?
couldn't you be supporting?
couldn't they be supporting? 	couldn't I have supported?
couldn't you have supported?
couldn't he have supported?
couldn't we have supported?
couldn't you have supported?
couldn't they have supported? 	couldn't I have been supporting?
couldn't you have been supporting?
couldn't he have been supporting?
couldn't we have been supporting?
couldn't you have been supporting?
couldn't they have been supporting?