could dapple
Regular verb: dapple - dappled- dappled

Affirmation 	
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I could dapple
you could dapple
she could dapple
we could dapple
you could dapple
they could dapple 	I could be dappling
you could be dappling
she could be dappling
we could be dappling
you could be dappling
they could be dappling	I could have dappled
you could have dappled
she could have dappled
we could have dappled
you could have dappled
they could have dappled	I could have been dappling
you could have been dappling
she could have been dappling
we could have been dappling
you could have been dappling
they could have been dappling	

Negation 	
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I couldn't dapple
you couldn't dapple
she couldn't dapple
we couldn't dapple
you couldn't dapple
they couldn't dapple 	I couldn't be dappling
you couldn't be dappling
she couldn't be dappling
we couldn't be dappling
you couldn't be dappling
they couldn't be dappling	I couldn't have dappled
you couldn't have dappled
she couldn't have dappled
we couldn't have dappled
you couldn't have dappled
they couldn't have dappled	I couldn't have been dappling
you couldn't have been dappling
she couldn't have been dappling
we couldn't have been dappling
you couldn't have been dappling
they couldn't have been dappling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I dapple?
could you dapple?
could she dapple?
could we dapple?
could you dapple?
could they dapple? 	could I be dappling?
could you be dappling?
could she be dappling?
could we be dappling?
could you be dappling?
could they be dappling? 	could I have dappled?
could you have dappled?
could she have dappled?
could we have dappled?
could you have dappled?
could they have dappled? 	could I have been dappling?
could you have been dappling?
could she have been dappling?
could we have been dappling?
could you have been dappling?
could they have been dappling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I dapple?
couldn't you dapple?
couldn't she dapple?
couldn't we dapple?
couldn't you dapple?
couldn't they dapple? 	couldn't I be dappling?
couldn't you be dappling?
couldn't she be dappling?
couldn't we be dappling?
couldn't you be dappling?
couldn't they be dappling? 	couldn't I have dappled?
couldn't you have dappled?
couldn't she have dappled?
couldn't we have dappled?
couldn't you have dappled?
couldn't they have dappled? 	couldn't I have been dappling?
couldn't you have been dappling?
couldn't she have been dappling?
couldn't we have been dappling?
couldn't you have been dappling?
couldn't they have been dappling?