must swish
Regular verb: swish - swished- swished

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must swish
you must swish
she must swish
we must swish
you must swish
they must swish 	I must be swishing
you must be swishing
she must be swishing
we must be swishing
you must be swishing
they must be swishing	I must have swished
you must have swished
she must have swished
we must have swished
you must have swished
they must have swished	I must have been swishing
you must have been swishing
she must have been swishing
we must have been swishing
you must have been swishing
they must have been swishing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not swish
you must not swish
she must not swish
we must not swish
you must not swish
they must not swish 	I must not be swishing
you must not be swishing
she must not be swishing
we must not be swishing
you must not be swishing
they must not be swishing	I must not have swished
you must not have swished
she must not have swished
we must not have swished
you must not have swished
they must not have swished	I must not have been swishing
you must not have been swishing
she must not have been swishing
we must not have been swishing
you must not have been swishing
they must not have been swishing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I swish?
must you swish?
must she swish?
must we swish?
must you swish?
must they swish? 	must I be swishing?
must you be swishing?
must she be swishing?
must we be swishing?
must you be swishing?
must they be swishing? 	must I have swished?
must you have swished?
must she have swished?
must we have swished?
must you have swished?
must they have swished? 	must I have been swishing?
must you have been swishing?
must she have been swishing?
must we have been swishing?
must you have been swishing?
must they have been swishing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not swish?
must you not swish?
must she not swish?
must we not swish?
must you not swish?
must they not swish? 	must I not be swishing?
must you not be swishing?
must she not be swishing?
must we not be swishing?
must you not be swishing?
must they not be swishing? 	must I not have swished?
must you not have swished?
must she not have swished?
must we not have swished?
must you not have swished?
must they not have swished? 	must I not have been swishing?
must you not have been swishing?
must she not have been swishing?
must we not have been swishing?
must you not have been swishing?
must they not have been swishing?