must rethink
Irregular verb: rethink - rethought- rethought

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must rethink
you must rethink
he must rethink
we must rethink
you must rethink
they must rethink 	I must be rethinking
you must be rethinking
he must be rethinking
we must be rethinking
you must be rethinking
they must be rethinking	I must have rethought
you must have rethought
he must have rethought
we must have rethought
you must have rethought
they must have rethought	I must have been rethinking
you must have been rethinking
he must have been rethinking
we must have been rethinking
you must have been rethinking
they must have been rethinking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not rethink
you must not rethink
he must not rethink
we must not rethink
you must not rethink
they must not rethink 	I must not be rethinking
you must not be rethinking
he must not be rethinking
we must not be rethinking
you must not be rethinking
they must not be rethinking	I must not have rethought
you must not have rethought
he must not have rethought
we must not have rethought
you must not have rethought
they must not have rethought	I must not have been rethinking
you must not have been rethinking
he must not have been rethinking
we must not have been rethinking
you must not have been rethinking
they must not have been rethinking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I rethink?
must you rethink?
must he rethink?
must we rethink?
must you rethink?
must they rethink? 	must I be rethinking?
must you be rethinking?
must he be rethinking?
must we be rethinking?
must you be rethinking?
must they be rethinking? 	must I have rethought?
must you have rethought?
must he have rethought?
must we have rethought?
must you have rethought?
must they have rethought? 	must I have been rethinking?
must you have been rethinking?
must he have been rethinking?
must we have been rethinking?
must you have been rethinking?
must they have been rethinking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not rethink?
must you not rethink?
must he not rethink?
must we not rethink?
must you not rethink?
must they not rethink? 	must I not be rethinking?
must you not be rethinking?
must he not be rethinking?
must we not be rethinking?
must you not be rethinking?
must they not be rethinking? 	must I not have rethought?
must you not have rethought?
must he not have rethought?
must we not have rethought?
must you not have rethought?
must they not have rethought? 	must I not have been rethinking?
must you not have been rethinking?
must he not have been rethinking?
must we not have been rethinking?
must you not have been rethinking?
must they not have been rethinking?