could motorbike
Regular verb: motorbike - motorbiked- motorbiked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could motorbike
you could motorbike
he could motorbike
we could motorbike
you could motorbike
they could motorbike 	I could be motorbiking
you could be motorbiking
he could be motorbiking
we could be motorbiking
you could be motorbiking
they could be motorbiking	I could have motorbiked
you could have motorbiked
he could have motorbiked
we could have motorbiked
you could have motorbiked
they could have motorbiked	I could have been motorbiking
you could have been motorbiking
he could have been motorbiking
we could have been motorbiking
you could have been motorbiking
they could have been motorbiking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not motorbike
you could not motorbike
he could not motorbike
we could not motorbike
you could not motorbike
they could not motorbike 	I could not be motorbiking
you could not be motorbiking
he could not be motorbiking
we could not be motorbiking
you could not be motorbiking
they could not be motorbiking	I could not have motorbiked
you could not have motorbiked
he could not have motorbiked
we could not have motorbiked
you could not have motorbiked
they could not have motorbiked	I could not have been motorbiking
you could not have been motorbiking
he could not have been motorbiking
we could not have been motorbiking
you could not have been motorbiking
they could not have been motorbiking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I motorbike?
could you motorbike?
could he motorbike?
could we motorbike?
could you motorbike?
could they motorbike? 	could I be motorbiking?
could you be motorbiking?
could he be motorbiking?
could we be motorbiking?
could you be motorbiking?
could they be motorbiking? 	could I have motorbiked?
could you have motorbiked?
could he have motorbiked?
could we have motorbiked?
could you have motorbiked?
could they have motorbiked? 	could I have been motorbiking?
could you have been motorbiking?
could he have been motorbiking?
could we have been motorbiking?
could you have been motorbiking?
could they have been motorbiking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not motorbike?
could you not motorbike?
could he not motorbike?
could we not motorbike?
could you not motorbike?
could they not motorbike? 	could I not be motorbiking?
could you not be motorbiking?
could he not be motorbiking?
could we not be motorbiking?
could you not be motorbiking?
could they not be motorbiking? 	could I not have motorbiked?
could you not have motorbiked?
could he not have motorbiked?
could we not have motorbiked?
could you not have motorbiked?
could they not have motorbiked? 	could I not have been motorbiking?
could you not have been motorbiking?
could he not have been motorbiking?
could we not have been motorbiking?
could you not have been motorbiking?
could they not have been motorbiking?