must pine
Regular verb: pine - pined- pined

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must pine
you must pine
she must pine
we must pine
you must pine
they must pine 	I must be pining
you must be pining
she must be pining
we must be pining
you must be pining
they must be pining	I must have pined
you must have pined
she must have pined
we must have pined
you must have pined
they must have pined	I must have been pining
you must have been pining
she must have been pining
we must have been pining
you must have been pining
they must have been pining	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't pine
you mustn't pine
she mustn't pine
we mustn't pine
you mustn't pine
they mustn't pine 	I mustn't be pining
you mustn't be pining
she mustn't be pining
we mustn't be pining
you mustn't be pining
they mustn't be pining	I mustn't have pined
you mustn't have pined
she mustn't have pined
we mustn't have pined
you mustn't have pined
they mustn't have pined	I mustn't have been pining
you mustn't have been pining
she mustn't have been pining
we mustn't have been pining
you mustn't have been pining
they mustn't have been pining	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I pine?
must you pine?
must she pine?
must we pine?
must you pine?
must they pine? 	must I be pining?
must you be pining?
must she be pining?
must we be pining?
must you be pining?
must they be pining? 	must I have pined?
must you have pined?
must she have pined?
must we have pined?
must you have pined?
must they have pined? 	must I have been pining?
must you have been pining?
must she have been pining?
must we have been pining?
must you have been pining?
must they have been pining? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I pine?
mustn't you pine?
mustn't she pine?
mustn't we pine?
mustn't you pine?
mustn't they pine? 	mustn't I be pining?
mustn't you be pining?
mustn't she be pining?
mustn't we be pining?
mustn't you be pining?
mustn't they be pining? 	mustn't I have pined?
mustn't you have pined?
mustn't she have pined?
mustn't we have pined?
mustn't you have pined?
mustn't they have pined? 	mustn't I have been pining?
mustn't you have been pining?
mustn't she have been pining?
mustn't we have been pining?
mustn't you have been pining?
mustn't they have been pining?