could push
Regular verb: push - pushed- pushed

Affirmation 	
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I could push
you could push
she could push
we could push
you could push
they could push 	I could be pushing
you could be pushing
she could be pushing
we could be pushing
you could be pushing
they could be pushing	I could have pushed
you could have pushed
she could have pushed
we could have pushed
you could have pushed
they could have pushed	I could have been pushing
you could have been pushing
she could have been pushing
we could have been pushing
you could have been pushing
they could have been pushing	

Negation 	
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I couldn't push
you couldn't push
she couldn't push
we couldn't push
you couldn't push
they couldn't push 	I couldn't be pushing
you couldn't be pushing
she couldn't be pushing
we couldn't be pushing
you couldn't be pushing
they couldn't be pushing	I couldn't have pushed
you couldn't have pushed
she couldn't have pushed
we couldn't have pushed
you couldn't have pushed
they couldn't have pushed	I couldn't have been pushing
you couldn't have been pushing
she couldn't have been pushing
we couldn't have been pushing
you couldn't have been pushing
they couldn't have been pushing	

Interrogative form 	
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could I push?
could you push?
could she push?
could we push?
could you push?
could they push? 	could I be pushing?
could you be pushing?
could she be pushing?
could we be pushing?
could you be pushing?
could they be pushing? 	could I have pushed?
could you have pushed?
could she have pushed?
could we have pushed?
could you have pushed?
could they have pushed? 	could I have been pushing?
could you have been pushing?
could she have been pushing?
could we have been pushing?
could you have been pushing?
could they have been pushing? 	

Interro-negative form 	
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couldn't I push?
couldn't you push?
couldn't she push?
couldn't we push?
couldn't you push?
couldn't they push? 	couldn't I be pushing?
couldn't you be pushing?
couldn't she be pushing?
couldn't we be pushing?
couldn't you be pushing?
couldn't they be pushing? 	couldn't I have pushed?
couldn't you have pushed?
couldn't she have pushed?
couldn't we have pushed?
couldn't you have pushed?
couldn't they have pushed? 	couldn't I have been pushing?
couldn't you have been pushing?
couldn't she have been pushing?
couldn't we have been pushing?
couldn't you have been pushing?
couldn't they have been pushing?