could sidestroke
Regular verb: sidestroke - sidestroked- sidestroked

Affirmation 	
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I could sidestroke
you could sidestroke
she could sidestroke
we could sidestroke
you could sidestroke
they could sidestroke 	I could be sidestroking
you could be sidestroking
she could be sidestroking
we could be sidestroking
you could be sidestroking
they could be sidestroking	I could have sidestroked
you could have sidestroked
she could have sidestroked
we could have sidestroked
you could have sidestroked
they could have sidestroked	I could have been sidestroking
you could have been sidestroking
she could have been sidestroking
we could have been sidestroking
you could have been sidestroking
they could have been sidestroking	

Negation 	
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I could not sidestroke
you could not sidestroke
she could not sidestroke
we could not sidestroke
you could not sidestroke
they could not sidestroke 	I could not be sidestroking
you could not be sidestroking
she could not be sidestroking
we could not be sidestroking
you could not be sidestroking
they could not be sidestroking	I could not have sidestroked
you could not have sidestroked
she could not have sidestroked
we could not have sidestroked
you could not have sidestroked
they could not have sidestroked	I could not have been sidestroking
you could not have been sidestroking
she could not have been sidestroking
we could not have been sidestroking
you could not have been sidestroking
they could not have been sidestroking	

Interrogative form 	
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could I sidestroke?
could you sidestroke?
could she sidestroke?
could we sidestroke?
could you sidestroke?
could they sidestroke? 	could I be sidestroking?
could you be sidestroking?
could she be sidestroking?
could we be sidestroking?
could you be sidestroking?
could they be sidestroking? 	could I have sidestroked?
could you have sidestroked?
could she have sidestroked?
could we have sidestroked?
could you have sidestroked?
could they have sidestroked? 	could I have been sidestroking?
could you have been sidestroking?
could she have been sidestroking?
could we have been sidestroking?
could you have been sidestroking?
could they have been sidestroking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not sidestroke?
could you not sidestroke?
could she not sidestroke?
could we not sidestroke?
could you not sidestroke?
could they not sidestroke? 	could I not be sidestroking?
could you not be sidestroking?
could she not be sidestroking?
could we not be sidestroking?
could you not be sidestroking?
could they not be sidestroking? 	could I not have sidestroked?
could you not have sidestroked?
could she not have sidestroked?
could we not have sidestroked?
could you not have sidestroked?
could they not have sidestroked? 	could I not have been sidestroking?
could you not have been sidestroking?
could she not have been sidestroking?
could we not have been sidestroking?
could you not have been sidestroking?
could they not have been sidestroking?