could shoulder
Regular verb: shoulder - shouldered- shouldered

Affirmation 	
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I could shoulder
you could shoulder
he could shoulder
we could shoulder
you could shoulder
they could shoulder 	I could be shouldering
you could be shouldering
he could be shouldering
we could be shouldering
you could be shouldering
they could be shouldering	I could have shouldered
you could have shouldered
he 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
he 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
he 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
he 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
he 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
he 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 he shoulder?
could we shoulder?
could you shoulder?
could they shoulder? 	could I be shouldering?
could you be shouldering?
could he be shouldering?
could we be shouldering?
could you be shouldering?
could they be shouldering? 	could I have shouldered?
could you have shouldered?
could he 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 he 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 he 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 he 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 he 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 he have been shouldering?
couldn't we have been shouldering?
couldn't you have been shouldering?
couldn't they have been shouldering?