English verb conjugation
MUST GASIFY

Regular verb: gasify - gasified - gasified

Affirmation

Simple form	V-ing form
I must gasify you must gasify he must gasify we must gasify you must gasify they must gasify	I must be gasifying you must be gasifying he must be gasifying we must be gasifying you must be gasifying they must be gasifying
Perfect	V-ing perfect
I must have gasified you must have gasified he must have gasified we must have gasified you must have gasified they must have gasified	I must have been gasifying you must have been gasifying he must have been gasifying we must have been gasifying you must have been gasifying they must have been gasifying

Negation

Simple form	V-ing form
I mustn't gasify you mustn't gasify he mustn't gasify we mustn't gasify you mustn't gasify they mustn't gasify	I mustn't be gasifying you mustn't be gasifying he mustn't be gasifying we mustn't be gasifying you mustn't be gasifying they mustn't be gasifying
Perfect	V-ing perfect
I mustn't have gasified you mustn't have gasified he mustn't have gasified we mustn't have gasified you mustn't have gasified they mustn't have gasified	I mustn't have been gasifying you mustn't have been gasifying he mustn't have been gasifying we mustn't have been gasifying you mustn't have been gasifying they mustn't have been gasifying

Interrogative form

Simple form	V-ing form
must I gasify? must you gasify? must he gasify? must we gasify? must you gasify? must they gasify?	must I be gasifying? must you be gasifying? must he be gasifying? must we be gasifying? must you be gasifying? must they be gasifying?
Perfect	V-ing perfect
must I have gasified? must you have gasified? must he have gasified? must we have gasified? must you have gasified? must they have gasified?	must I have been gasifying? must you have been gasifying? must he have been gasifying? must we have been gasifying? must you have been gasifying? must they have been gasifying?

Interro-negative form

Simple form	V-ing form
mustn't I gasify? mustn't you gasify? mustn't he gasify? mustn't we gasify? mustn't you gasify? mustn't they gasify?	mustn't I be gasifying? mustn't you be gasifying? mustn't he be gasifying? mustn't we be gasifying? mustn't you be gasifying? mustn't they be gasifying?
Perfect	V-ing perfect
mustn't I have gasified? mustn't you have gasified? mustn't he have gasified? mustn't we have gasified? mustn't you have gasified? mustn't they have gasified?	mustn't I have been gasifying? mustn't you have been gasifying? mustn't he have been gasifying? mustn't we have been gasifying? mustn't you have been gasifying? mustn't they have been gasifying?