must swallow
Regular verb: swallow - swallowed- swallowed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must swallow
you must swallow
she must swallow
we must swallow
you must swallow
they must swallow 	I must be swallowing
you must be swallowing
she must be swallowing
we must be swallowing
you must be swallowing
they must be swallowing	I must have swallowed
you must have swallowed
she must have swallowed
we must have swallowed
you must have swallowed
they must have swallowed	I must have been swallowing
you must have been swallowing
she must have been swallowing
we must have been swallowing
you must have been swallowing
they must have been swallowing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't swallow
you mustn't swallow
she mustn't swallow
we mustn't swallow
you mustn't swallow
they mustn't swallow 	I mustn't be swallowing
you mustn't be swallowing
she mustn't be swallowing
we mustn't be swallowing
you mustn't be swallowing
they mustn't be swallowing	I mustn't have swallowed
you mustn't have swallowed
she mustn't have swallowed
we mustn't have swallowed
you mustn't have swallowed
they mustn't have swallowed	I mustn't have been swallowing
you mustn't have been swallowing
she mustn't have been swallowing
we mustn't have been swallowing
you mustn't have been swallowing
they mustn't have been swallowing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I swallow?
must you swallow?
must she swallow?
must we swallow?
must you swallow?
must they swallow? 	must I be swallowing?
must you be swallowing?
must she be swallowing?
must we be swallowing?
must you be swallowing?
must they be swallowing? 	must I have swallowed?
must you have swallowed?
must she have swallowed?
must we have swallowed?
must you have swallowed?
must they have swallowed? 	must I have been swallowing?
must you have been swallowing?
must she have been swallowing?
must we have been swallowing?
must you have been swallowing?
must they have been swallowing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I swallow?
mustn't you swallow?
mustn't she swallow?
mustn't we swallow?
mustn't you swallow?
mustn't they swallow? 	mustn't I be swallowing?
mustn't you be swallowing?
mustn't she be swallowing?
mustn't we be swallowing?
mustn't you be swallowing?
mustn't they be swallowing? 	mustn't I have swallowed?
mustn't you have swallowed?
mustn't she have swallowed?
mustn't we have swallowed?
mustn't you have swallowed?
mustn't they have swallowed? 	mustn't I have been swallowing?
mustn't you have been swallowing?
mustn't she have been swallowing?
mustn't we have been swallowing?
mustn't you have been swallowing?
mustn't they have been swallowing?