English verb conjugation
MUST GRATULATE

Regular verb: gratulate - gratulated - gratulated

Affirmation

Simple form	V-ing form
I must gratulate you must gratulate he must gratulate we must gratulate you must gratulate they must gratulate	I must be gratulating you must be gratulating he must be gratulating we must be gratulating you must be gratulating they must be gratulating
Perfect	V-ing perfect
I must have gratulated you must have gratulated he must have gratulated we must have gratulated you must have gratulated they must have gratulated	I must have been gratulating you must have been gratulating he must have been gratulating we must have been gratulating you must have been gratulating they must have been gratulating

Negation

Simple form	V-ing form
I mustn't gratulate you mustn't gratulate he mustn't gratulate we mustn't gratulate you mustn't gratulate they mustn't gratulate	I mustn't be gratulating you mustn't be gratulating he mustn't be gratulating we mustn't be gratulating you mustn't be gratulating they mustn't be gratulating
Perfect	V-ing perfect
I mustn't have gratulated you mustn't have gratulated he mustn't have gratulated we mustn't have gratulated you mustn't have gratulated they mustn't have gratulated	I mustn't have been gratulating you mustn't have been gratulating he mustn't have been gratulating we mustn't have been gratulating you mustn't have been gratulating they mustn't have been gratulating

Interrogative form

Simple form	V-ing form
must I gratulate? must you gratulate? must he gratulate? must we gratulate? must you gratulate? must they gratulate?	must I be gratulating? must you be gratulating? must he be gratulating? must we be gratulating? must you be gratulating? must they be gratulating?
Perfect	V-ing perfect
must I have gratulated? must you have gratulated? must he have gratulated? must we have gratulated? must you have gratulated? must they have gratulated?	must I have been gratulating? must you have been gratulating? must he have been gratulating? must we have been gratulating? must you have been gratulating? must they have been gratulating?

Interro-negative form

Simple form	V-ing form
mustn't I gratulate? mustn't you gratulate? mustn't he gratulate? mustn't we gratulate? mustn't you gratulate? mustn't they gratulate?	mustn't I be gratulating? mustn't you be gratulating? mustn't he be gratulating? mustn't we be gratulating? mustn't you be gratulating? mustn't they be gratulating?
Perfect	V-ing perfect
mustn't I have gratulated? mustn't you have gratulated? mustn't he have gratulated? mustn't we have gratulated? mustn't you have gratulated? mustn't they have gratulated?	mustn't I have been gratulating? mustn't you have been gratulating? mustn't he have been gratulating? mustn't we have been gratulating? mustn't you have been gratulating? mustn't they have been gratulating?