must struggle
Regular verb: struggle - struggled- struggled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must struggle
you must struggle
she must struggle
we must struggle
you must struggle
they must struggle 	I must be struggling
you must be struggling
she must be struggling
we must be struggling
you must be struggling
they must be struggling	I must have struggled
you must have struggled
she must have struggled
we must have struggled
you must have struggled
they must have struggled	I must have been struggling
you must have been struggling
she must have been struggling
we must have been struggling
you must have been struggling
they must have been struggling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't struggle
you mustn't struggle
she mustn't struggle
we mustn't struggle
you mustn't struggle
they mustn't struggle 	I mustn't be struggling
you mustn't be struggling
she mustn't be struggling
we mustn't be struggling
you mustn't be struggling
they mustn't be struggling	I mustn't have struggled
you mustn't have struggled
she mustn't have struggled
we mustn't have struggled
you mustn't have struggled
they mustn't have struggled	I mustn't have been struggling
you mustn't have been struggling
she mustn't have been struggling
we mustn't have been struggling
you mustn't have been struggling
they mustn't have been struggling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I struggle?
must you struggle?
must she struggle?
must we struggle?
must you struggle?
must they struggle? 	must I be struggling?
must you be struggling?
must she be struggling?
must we be struggling?
must you be struggling?
must they be struggling? 	must I have struggled?
must you have struggled?
must she have struggled?
must we have struggled?
must you have struggled?
must they have struggled? 	must I have been struggling?
must you have been struggling?
must she have been struggling?
must we have been struggling?
must you have been struggling?
must they have been struggling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I struggle?
mustn't you struggle?
mustn't she struggle?
mustn't we struggle?
mustn't you struggle?
mustn't they struggle? 	mustn't I be struggling?
mustn't you be struggling?
mustn't she be struggling?
mustn't we be struggling?
mustn't you be struggling?
mustn't they be struggling? 	mustn't I have struggled?
mustn't you have struggled?
mustn't she have struggled?
mustn't we have struggled?
mustn't you have struggled?
mustn't they have struggled? 	mustn't I have been struggling?
mustn't you have been struggling?
mustn't she have been struggling?
mustn't we have been struggling?
mustn't you have been struggling?
mustn't they have been struggling?