must thatch
Regular verb: thatch - thatched- thatched

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must thatch
you must thatch
she must thatch
we must thatch
you must thatch
they must thatch 	I must be thatching
you must be thatching
she must be thatching
we must be thatching
you must be thatching
they must be thatching	I must have thatched
you must have thatched
she must have thatched
we must have thatched
you must have thatched
they must have thatched	I must have been thatching
you must have been thatching
she must have been thatching
we must have been thatching
you must have been thatching
they must have been thatching	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't thatch
you mustn't thatch
she mustn't thatch
we mustn't thatch
you mustn't thatch
they mustn't thatch 	I mustn't be thatching
you mustn't be thatching
she mustn't be thatching
we mustn't be thatching
you mustn't be thatching
they mustn't be thatching	I mustn't have thatched
you mustn't have thatched
she mustn't have thatched
we mustn't have thatched
you mustn't have thatched
they mustn't have thatched	I mustn't have been thatching
you mustn't have been thatching
she mustn't have been thatching
we mustn't have been thatching
you mustn't have been thatching
they mustn't have been thatching	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I thatch?
must you thatch?
must she thatch?
must we thatch?
must you thatch?
must they thatch? 	must I be thatching?
must you be thatching?
must she be thatching?
must we be thatching?
must you be thatching?
must they be thatching? 	must I have thatched?
must you have thatched?
must she have thatched?
must we have thatched?
must you have thatched?
must they have thatched? 	must I have been thatching?
must you have been thatching?
must she have been thatching?
must we have been thatching?
must you have been thatching?
must they have been thatching? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I thatch?
mustn't you thatch?
mustn't she thatch?
mustn't we thatch?
mustn't you thatch?
mustn't they thatch? 	mustn't I be thatching?
mustn't you be thatching?
mustn't she be thatching?
mustn't we be thatching?
mustn't you be thatching?
mustn't they be thatching? 	mustn't I have thatched?
mustn't you have thatched?
mustn't she have thatched?
mustn't we have thatched?
mustn't you have thatched?
mustn't they have thatched? 	mustn't I have been thatching?
mustn't you have been thatching?
mustn't she have been thatching?
mustn't we have been thatching?
mustn't you have been thatching?
mustn't they have been thatching?