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 must not swallow
you must not swallow
she must not swallow
we must not swallow
you must not swallow
they must not swallow 	I must not be swallowing
you must not be swallowing
she must not be swallowing
we must not be swallowing
you must not be swallowing
they must not be swallowing	I must not have swallowed
you must not have swallowed
she must not have swallowed
we must not have swallowed
you must not have swallowed
they must not have swallowed	I must not have been swallowing
you must not have been swallowing
she must not have been swallowing
we must not have been swallowing
you must not have been swallowing
they must not 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 	
must I not swallow?
must you not swallow?
must she not swallow?
must we not swallow?
must you not swallow?
must they not swallow? 	must I not be swallowing?
must you not be swallowing?
must she not be swallowing?
must we not be swallowing?
must you not be swallowing?
must they not be swallowing? 	must I not have swallowed?
must you not have swallowed?
must she not have swallowed?
must we not have swallowed?
must you not have swallowed?
must they not have swallowed? 	must I not have been swallowing?
must you not have been swallowing?
must she not have been swallowing?
must we not have been swallowing?
must you not have been swallowing?
must they not have been swallowing?