English verb conjugation
MUST DRAUGHT-PROOF

Regular verb: draught-proof - draught-proofed - draught-proofed

Affirmation

Simple form	V-ing form
I must draught-proof you must draught-proof he must draught-proof we must draught-proof you must draught-proof they must draught-proof	I must be draught-proofing you must be draught-proofing he must be draught-proofing we must be draught-proofing you must be draught-proofing they must be draught-proofing
Perfect	V-ing perfect
I must have draught-proofed you must have draught-proofed he must have draught-proofed we must have draught-proofed you must have draught-proofed they must have draught-proofed	I must have been draught-proofing you must have been draught-proofing he must have been draught-proofing we must have been draught-proofing you must have been draught-proofing they must have been draught-proofing

Negation

Simple form	V-ing form
I mustn't draught-proof you mustn't draught-proof he mustn't draught-proof we mustn't draught-proof you mustn't draught-proof they mustn't draught-proof	I mustn't be draught-proofing you mustn't be draught-proofing he mustn't be draught-proofing we mustn't be draught-proofing you mustn't be draught-proofing they mustn't be draught-proofing
Perfect	V-ing perfect
I mustn't have draught-proofed you mustn't have draught-proofed he mustn't have draught-proofed we mustn't have draught-proofed you mustn't have draught-proofed they mustn't have draught-proofed	I mustn't have been draught-proofing you mustn't have been draught-proofing he mustn't have been draught-proofing we mustn't have been draught-proofing you mustn't have been draught-proofing they mustn't have been draught-proofing

Interrogative form

Simple form	V-ing form
must I draught-proof? must you draught-proof? must he draught-proof? must we draught-proof? must you draught-proof? must they draught-proof?	must I be draught-proofing? must you be draught-proofing? must he be draught-proofing? must we be draught-proofing? must you be draught-proofing? must they be draught-proofing?
Perfect	V-ing perfect
must I have draught-proofed? must you have draught-proofed? must he have draught-proofed? must we have draught-proofed? must you have draught-proofed? must they have draught-proofed?	must I have been draught-proofing? must you have been draught-proofing? must he have been draught-proofing? must we have been draught-proofing? must you have been draught-proofing? must they have been draught-proofing?

Interro-negative form

Simple form	V-ing form
mustn't I draught-proof? mustn't you draught-proof? mustn't he draught-proof? mustn't we draught-proof? mustn't you draught-proof? mustn't they draught-proof?	mustn't I be draught-proofing? mustn't you be draught-proofing? mustn't he be draught-proofing? mustn't we be draught-proofing? mustn't you be draught-proofing? mustn't they be draught-proofing?
Perfect	V-ing perfect
mustn't I have draught-proofed? mustn't you have draught-proofed? mustn't he have draught-proofed? mustn't we have draught-proofed? mustn't you have draught-proofed? mustn't they have draught-proofed?	mustn't I have been draught-proofing? mustn't you have been draught-proofing? mustn't he have been draught-proofing? mustn't we have been draught-proofing? mustn't you have been draught-proofing? mustn't they have been draught-proofing?