could shipwreck
Regular verb: shipwreck - shipwrecked- shipwrecked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could shipwreck
you could shipwreck
he could shipwreck
we could shipwreck
you could shipwreck
they could shipwreck 	I could be shipwrecking
you could be shipwrecking
he could be shipwrecking
we could be shipwrecking
you could be shipwrecking
they could be shipwrecking	I could have shipwrecked
you could have shipwrecked
he could have shipwrecked
we could have shipwrecked
you could have shipwrecked
they could have shipwrecked	I could have been shipwrecking
you could have been shipwrecking
he could have been shipwrecking
we could have been shipwrecking
you could have been shipwrecking
they could have been shipwrecking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not shipwreck
you could not shipwreck
he could not shipwreck
we could not shipwreck
you could not shipwreck
they could not shipwreck 	I could not be shipwrecking
you could not be shipwrecking
he could not be shipwrecking
we could not be shipwrecking
you could not be shipwrecking
they could not be shipwrecking	I could not have shipwrecked
you could not have shipwrecked
he could not have shipwrecked
we could not have shipwrecked
you could not have shipwrecked
they could not have shipwrecked	I could not have been shipwrecking
you could not have been shipwrecking
he could not have been shipwrecking
we could not have been shipwrecking
you could not have been shipwrecking
they could not have been shipwrecking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I shipwreck?
could you shipwreck?
could he shipwreck?
could we shipwreck?
could you shipwreck?
could they shipwreck? 	could I be shipwrecking?
could you be shipwrecking?
could he be shipwrecking?
could we be shipwrecking?
could you be shipwrecking?
could they be shipwrecking? 	could I have shipwrecked?
could you have shipwrecked?
could he have shipwrecked?
could we have shipwrecked?
could you have shipwrecked?
could they have shipwrecked? 	could I have been shipwrecking?
could you have been shipwrecking?
could he have been shipwrecking?
could we have been shipwrecking?
could you have been shipwrecking?
could they have been shipwrecking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not shipwreck?
could you not shipwreck?
could he not shipwreck?
could we not shipwreck?
could you not shipwreck?
could they not shipwreck? 	could I not be shipwrecking?
could you not be shipwrecking?
could he not be shipwrecking?
could we not be shipwrecking?
could you not be shipwrecking?
could they not be shipwrecking? 	could I not have shipwrecked?
could you not have shipwrecked?
could he not have shipwrecked?
could we not have shipwrecked?
could you not have shipwrecked?
could they not have shipwrecked? 	could I not have been shipwrecking?
could you not have been shipwrecking?
could he not have been shipwrecking?
could we not have been shipwrecking?
could you not have been shipwrecking?
could they not have been shipwrecking?