must suffer
Regular verb: suffer - suffered- suffered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must suffer
you must suffer
he must suffer
we must suffer
you must suffer
they must suffer 	I must be suffering
you must be suffering
he must be suffering
we must be suffering
you must be suffering
they must be suffering	I must have suffered
you must have suffered
he must have suffered
we must have suffered
you must have suffered
they must have suffered	I must have been suffering
you must have been suffering
he must have been suffering
we must have been suffering
you must have been suffering
they must have been suffering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not suffer
you must not suffer
he must not suffer
we must not suffer
you must not suffer
they must not suffer 	I must not be suffering
you must not be suffering
he must not be suffering
we must not be suffering
you must not be suffering
they must not be suffering	I must not have suffered
you must not have suffered
he must not have suffered
we must not have suffered
you must not have suffered
they must not have suffered	I must not have been suffering
you must not have been suffering
he must not have been suffering
we must not have been suffering
you must not have been suffering
they must not have been suffering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I suffer?
must you suffer?
must he suffer?
must we suffer?
must you suffer?
must they suffer? 	must I be suffering?
must you be suffering?
must he be suffering?
must we be suffering?
must you be suffering?
must they be suffering? 	must I have suffered?
must you have suffered?
must he have suffered?
must we have suffered?
must you have suffered?
must they have suffered? 	must I have been suffering?
must you have been suffering?
must he have been suffering?
must we have been suffering?
must you have been suffering?
must they have been suffering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not suffer?
must you not suffer?
must he not suffer?
must we not suffer?
must you not suffer?
must they not suffer? 	must I not be suffering?
must you not be suffering?
must he not be suffering?
must we not be suffering?
must you not be suffering?
must they not be suffering? 	must I not have suffered?
must you not have suffered?
must he not have suffered?
must we not have suffered?
must you not have suffered?
must they not have suffered? 	must I not have been suffering?
must you not have been suffering?
must he not have been suffering?
must we not have been suffering?
must you not have been suffering?
must they not have been suffering?