must deforest
Regular verb: deforest - deforested- deforested

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must deforest
you must deforest
she must deforest
we must deforest
you must deforest
they must deforest 	I must be deforesting
you must be deforesting
she must be deforesting
we must be deforesting
you must be deforesting
they must be deforesting	I must have deforested
you must have deforested
she must have deforested
we must have deforested
you must have deforested
they must have deforested	I must have been deforesting
you must have been deforesting
she must have been deforesting
we must have been deforesting
you must have been deforesting
they must have been deforesting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't deforest
you mustn't deforest
she mustn't deforest
we mustn't deforest
you mustn't deforest
they mustn't deforest 	I mustn't be deforesting
you mustn't be deforesting
she mustn't be deforesting
we mustn't be deforesting
you mustn't be deforesting
they mustn't be deforesting	I mustn't have deforested
you mustn't have deforested
she mustn't have deforested
we mustn't have deforested
you mustn't have deforested
they mustn't have deforested	I mustn't have been deforesting
you mustn't have been deforesting
she mustn't have been deforesting
we mustn't have been deforesting
you mustn't have been deforesting
they mustn't have been deforesting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I deforest?
must you deforest?
must she deforest?
must we deforest?
must you deforest?
must they deforest? 	must I be deforesting?
must you be deforesting?
must she be deforesting?
must we be deforesting?
must you be deforesting?
must they be deforesting? 	must I have deforested?
must you have deforested?
must she have deforested?
must we have deforested?
must you have deforested?
must they have deforested? 	must I have been deforesting?
must you have been deforesting?
must she have been deforesting?
must we have been deforesting?
must you have been deforesting?
must they have been deforesting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I deforest?
mustn't you deforest?
mustn't she deforest?
mustn't we deforest?
mustn't you deforest?
mustn't they deforest? 	mustn't I be deforesting?
mustn't you be deforesting?
mustn't she be deforesting?
mustn't we be deforesting?
mustn't you be deforesting?
mustn't they be deforesting? 	mustn't I have deforested?
mustn't you have deforested?
mustn't she have deforested?
mustn't we have deforested?
mustn't you have deforested?
mustn't they have deforested? 	mustn't I have been deforesting?
mustn't you have been deforesting?
mustn't she have been deforesting?
mustn't we have been deforesting?
mustn't you have been deforesting?
mustn't they have been deforesting?