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 must not pine
you must not pine
she must not pine
we must not pine
you must not pine
they must not pine 	I must not be pining
you must not be pining
she must not be pining
we must not be pining
you must not be pining
they must not be pining	I must not have pined
you must not have pined
she must not have pined
we must not have pined
you must not have pined
they must not have pined	I must not have been pining
you must not have been pining
she must not have been pining
we must not have been pining
you must not have been pining
they must not 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 	
must I not pine?
must you not pine?
must she not pine?
must we not pine?
must you not pine?
must they not pine? 	must I not be pining?
must you not be pining?
must she not be pining?
must we not be pining?
must you not be pining?
must they not be pining? 	must I not have pined?
must you not have pined?
must she not have pined?
must we not have pined?
must you not have pined?
must they not have pined? 	must I not have been pining?
must you not have been pining?
must she not have been pining?
must we not have been pining?
must you not have been pining?
must they not have been pining?