must babyproof
Regular verb: babyproof - babyproofed- babyproofed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must babyproof
you must babyproof
he must babyproof
we must babyproof
you must babyproof
they must babyproof 	I must be babyproofing
you must be babyproofing
he must be babyproofing
we must be babyproofing
you must be babyproofing
they must be babyproofing	I must have babyproofed
you must have babyproofed
he must have babyproofed
we must have babyproofed
you must have babyproofed
they must have babyproofed	I must have been babyproofing
you must have been babyproofing
he must have been babyproofing
we must have been babyproofing
you must have been babyproofing
they must have been babyproofing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not babyproof
you must not babyproof
he must not babyproof
we must not babyproof
you must not babyproof
they must not babyproof 	I must not be babyproofing
you must not be babyproofing
he must not be babyproofing
we must not be babyproofing
you must not be babyproofing
they must not be babyproofing	I must not have babyproofed
you must not have babyproofed
he must not have babyproofed
we must not have babyproofed
you must not have babyproofed
they must not have babyproofed	I must not have been babyproofing
you must not have been babyproofing
he must not have been babyproofing
we must not have been babyproofing
you must not have been babyproofing
they must not have been babyproofing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I babyproof?
must you babyproof?
must he babyproof?
must we babyproof?
must you babyproof?
must they babyproof? 	must I be babyproofing?
must you be babyproofing?
must he be babyproofing?
must we be babyproofing?
must you be babyproofing?
must they be babyproofing? 	must I have babyproofed?
must you have babyproofed?
must he have babyproofed?
must we have babyproofed?
must you have babyproofed?
must they have babyproofed? 	must I have been babyproofing?
must you have been babyproofing?
must he have been babyproofing?
must we have been babyproofing?
must you have been babyproofing?
must they have been babyproofing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not babyproof?
must you not babyproof?
must he not babyproof?
must we not babyproof?
must you not babyproof?
must they not babyproof? 	must I not be babyproofing?
must you not be babyproofing?
must he not be babyproofing?
must we not be babyproofing?
must you not be babyproofing?
must they not be babyproofing? 	must I not have babyproofed?
must you not have babyproofed?
must he not have babyproofed?
must we not have babyproofed?
must you not have babyproofed?
must they not have babyproofed? 	must I not have been babyproofing?
must you not have been babyproofing?
must he not have been babyproofing?
must we not have been babyproofing?
must you not have been babyproofing?
must they not have been babyproofing?