must squash
Regular verb: squash - squashed- squashed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must squash
you must squash
she must squash
we must squash
you must squash
they must squash 	I must be squashing
you must be squashing
she must be squashing
we must be squashing
you must be squashing
they must be squashing	I must have squashed
you must have squashed
she must have squashed
we must have squashed
you must have squashed
they must have squashed	I must have been squashing
you must have been squashing
she must have been squashing
we must have been squashing
you must have been squashing
they must have been squashing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't squash
you mustn't squash
she mustn't squash
we mustn't squash
you mustn't squash
they mustn't squash 	I mustn't be squashing
you mustn't be squashing
she mustn't be squashing
we mustn't be squashing
you mustn't be squashing
they mustn't be squashing	I mustn't have squashed
you mustn't have squashed
she mustn't have squashed
we mustn't have squashed
you mustn't have squashed
they mustn't have squashed	I mustn't have been squashing
you mustn't have been squashing
she mustn't have been squashing
we mustn't have been squashing
you mustn't have been squashing
they mustn't have been squashing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I squash?
must you squash?
must she squash?
must we squash?
must you squash?
must they squash? 	must I be squashing?
must you be squashing?
must she be squashing?
must we be squashing?
must you be squashing?
must they be squashing? 	must I have squashed?
must you have squashed?
must she have squashed?
must we have squashed?
must you have squashed?
must they have squashed? 	must I have been squashing?
must you have been squashing?
must she have been squashing?
must we have been squashing?
must you have been squashing?
must they have been squashing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I squash?
mustn't you squash?
mustn't she squash?
mustn't we squash?
mustn't you squash?
mustn't they squash? 	mustn't I be squashing?
mustn't you be squashing?
mustn't she be squashing?
mustn't we be squashing?
mustn't you be squashing?
mustn't they be squashing? 	mustn't I have squashed?
mustn't you have squashed?
mustn't she have squashed?
mustn't we have squashed?
mustn't you have squashed?
mustn't they have squashed? 	mustn't I have been squashing?
mustn't you have been squashing?
mustn't she have been squashing?
mustn't we have been squashing?
mustn't you have been squashing?
mustn't they have been squashing?