could shoulder
Regular verb: shoulder - shouldered- shouldered

Affirmation 	
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I could shoulder
you could shoulder
she could shoulder
we could shoulder
you could shoulder
they could shoulder 	I could be shouldering
you could be shouldering
she could be shouldering
we could be shouldering
you could be shouldering
they could be shouldering	I could have shouldered
you could have shouldered
she could have shouldered
we could have shouldered
you could have shouldered
they could have shouldered	I could have been shouldering
you could have been shouldering
she could have been shouldering
we could have been shouldering
you could have been shouldering
they could have been shouldering	

Negation 	
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I couldn't shoulder
you couldn't shoulder
she couldn't shoulder
we couldn't shoulder
you couldn't shoulder
they couldn't shoulder 	I couldn't be shouldering
you couldn't be shouldering
she couldn't be shouldering
we couldn't be shouldering
you couldn't be shouldering
they couldn't be shouldering	I couldn't have shouldered
you couldn't have shouldered
she couldn't have shouldered
we couldn't have shouldered
you couldn't have shouldered
they couldn't have shouldered	I couldn't have been shouldering
you couldn't have been shouldering
she couldn't have been shouldering
we couldn't have been shouldering
you couldn't have been shouldering
they couldn't have been shouldering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I shoulder?
could you shoulder?
could she shoulder?
could we shoulder?
could you shoulder?
could they shoulder? 	could I be shouldering?
could you be shouldering?
could she be shouldering?
could we be shouldering?
could you be shouldering?
could they be shouldering? 	could I have shouldered?
could you have shouldered?
could she have shouldered?
could we have shouldered?
could you have shouldered?
could they have shouldered? 	could I have been shouldering?
could you have been shouldering?
could she have been shouldering?
could we have been shouldering?
could you have been shouldering?
could they have been shouldering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I shoulder?
couldn't you shoulder?
couldn't she shoulder?
couldn't we shoulder?
couldn't you shoulder?
couldn't they shoulder? 	couldn't I be shouldering?
couldn't you be shouldering?
couldn't she be shouldering?
couldn't we be shouldering?
couldn't you be shouldering?
couldn't they be shouldering? 	couldn't I have shouldered?
couldn't you have shouldered?
couldn't she have shouldered?
couldn't we have shouldered?
couldn't you have shouldered?
couldn't they have shouldered? 	couldn't I have been shouldering?
couldn't you have been shouldering?
couldn't she have been shouldering?
couldn't we have been shouldering?
couldn't you have been shouldering?
couldn't they have been shouldering?