could sidestroke
Regular verb: sidestroke - sidestroked- sidestroked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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 couldn't sidestroke
you couldn't sidestroke
she couldn't sidestroke
we couldn't sidestroke
you couldn't sidestroke
they couldn't sidestroke 	I couldn't be sidestroking
you couldn't be sidestroking
she couldn't be sidestroking
we couldn't be sidestroking
you couldn't be sidestroking
they couldn't be sidestroking	I couldn't have sidestroked
you couldn't have sidestroked
she couldn't have sidestroked
we couldn't have sidestroked
you couldn't have sidestroked
they couldn't have sidestroked	I couldn't have been sidestroking
you couldn't have been sidestroking
she couldn't have been sidestroking
we couldn't have been sidestroking
you couldn't have been sidestroking
they couldn't have been sidestroking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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 	
couldn't I sidestroke?
couldn't you sidestroke?
couldn't she sidestroke?
couldn't we sidestroke?
couldn't you sidestroke?
couldn't they sidestroke? 	couldn't I be sidestroking?
couldn't you be sidestroking?
couldn't she be sidestroking?
couldn't we be sidestroking?
couldn't you be sidestroking?
couldn't they be sidestroking? 	couldn't I have sidestroked?
couldn't you have sidestroked?
couldn't she have sidestroked?
couldn't we have sidestroked?
couldn't you have sidestroked?
couldn't they have sidestroked? 	couldn't I have been sidestroking?
couldn't you have been sidestroking?
couldn't she have been sidestroking?
couldn't we have been sidestroking?
couldn't you have been sidestroking?
couldn't they have been sidestroking?