must winterkill
Regular verb: winterkill - winterkilled- winterkilled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must winterkill
you must winterkill
she must winterkill
we must winterkill
you must winterkill
they must winterkill 	I must be winterkilling
you must be winterkilling
she must be winterkilling
we must be winterkilling
you must be winterkilling
they must be winterkilling	I must have winterkilled
you must have winterkilled
she must have winterkilled
we must have winterkilled
you must have winterkilled
they must have winterkilled	I must have been winterkilling
you must have been winterkilling
she must have been winterkilling
we must have been winterkilling
you must have been winterkilling
they must have been winterkilling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't winterkill
you mustn't winterkill
she mustn't winterkill
we mustn't winterkill
you mustn't winterkill
they mustn't winterkill 	I mustn't be winterkilling
you mustn't be winterkilling
she mustn't be winterkilling
we mustn't be winterkilling
you mustn't be winterkilling
they mustn't be winterkilling	I mustn't have winterkilled
you mustn't have winterkilled
she mustn't have winterkilled
we mustn't have winterkilled
you mustn't have winterkilled
they mustn't have winterkilled	I mustn't have been winterkilling
you mustn't have been winterkilling
she mustn't have been winterkilling
we mustn't have been winterkilling
you mustn't have been winterkilling
they mustn't have been winterkilling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I winterkill?
must you winterkill?
must she winterkill?
must we winterkill?
must you winterkill?
must they winterkill? 	must I be winterkilling?
must you be winterkilling?
must she be winterkilling?
must we be winterkilling?
must you be winterkilling?
must they be winterkilling? 	must I have winterkilled?
must you have winterkilled?
must she have winterkilled?
must we have winterkilled?
must you have winterkilled?
must they have winterkilled? 	must I have been winterkilling?
must you have been winterkilling?
must she have been winterkilling?
must we have been winterkilling?
must you have been winterkilling?
must they have been winterkilling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I winterkill?
mustn't you winterkill?
mustn't she winterkill?
mustn't we winterkill?
mustn't you winterkill?
mustn't they winterkill? 	mustn't I be winterkilling?
mustn't you be winterkilling?
mustn't she be winterkilling?
mustn't we be winterkilling?
mustn't you be winterkilling?
mustn't they be winterkilling? 	mustn't I have winterkilled?
mustn't you have winterkilled?
mustn't she have winterkilled?
mustn't we have winterkilled?
mustn't you have winterkilled?
mustn't they have winterkilled? 	mustn't I have been winterkilling?
mustn't you have been winterkilling?
mustn't she have been winterkilling?
mustn't we have been winterkilling?
mustn't you have been winterkilling?
mustn't they have been winterkilling?