must shipwreck
Regular verb: shipwreck - shipwrecked- shipwrecked

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

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

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

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