must swap
Regular verb: swap - swaped- swaped

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must swap
you must swap
she must swap
we must swap
you must swap
they must swap 	I must be swaping
you must be swaping
she must be swaping
we must be swaping
you must be swaping
they must be swaping	I must have swaped
you must have swaped
she must have swaped
we must have swaped
you must have swaped
they must have swaped	I must have been swaping
you must have been swaping
she must have been swaping
we must have been swaping
you must have been swaping
they must have been swaping	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't swap
you mustn't swap
she mustn't swap
we mustn't swap
you mustn't swap
they mustn't swap 	I mustn't be swaping
you mustn't be swaping
she mustn't be swaping
we mustn't be swaping
you mustn't be swaping
they mustn't be swaping	I mustn't have swaped
you mustn't have swaped
she mustn't have swaped
we mustn't have swaped
you mustn't have swaped
they mustn't have swaped	I mustn't have been swaping
you mustn't have been swaping
she mustn't have been swaping
we mustn't have been swaping
you mustn't have been swaping
they mustn't have been swaping	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I swap?
must you swap?
must she swap?
must we swap?
must you swap?
must they swap? 	must I be swaping?
must you be swaping?
must she be swaping?
must we be swaping?
must you be swaping?
must they be swaping? 	must I have swaped?
must you have swaped?
must she have swaped?
must we have swaped?
must you have swaped?
must they have swaped? 	must I have been swaping?
must you have been swaping?
must she have been swaping?
must we have been swaping?
must you have been swaping?
must they have been swaping? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I swap?
mustn't you swap?
mustn't she swap?
mustn't we swap?
mustn't you swap?
mustn't they swap? 	mustn't I be swaping?
mustn't you be swaping?
mustn't she be swaping?
mustn't we be swaping?
mustn't you be swaping?
mustn't they be swaping? 	mustn't I have swaped?
mustn't you have swaped?
mustn't she have swaped?
mustn't we have swaped?
mustn't you have swaped?
mustn't they have swaped? 	mustn't I have been swaping?
mustn't you have been swaping?
mustn't she have been swaping?
mustn't we have been swaping?
mustn't you have been swaping?
mustn't they have been swaping?