English verb conjugation
MUST STARTLE

Regular verb: startle - startled - startled

Affirmation

Simple form	V-ing form
I must startle you must startle he must startle we must startle you must startle they must startle	I must be startling you must be startling he must be startling we must be startling you must be startling they must be startling
Perfect	V-ing perfect
I must have startled you must have startled he must have startled we must have startled you must have startled they must have startled	I must have been startling you must have been startling he must have been startling we must have been startling you must have been startling they must have been startling

Negation

Simple form	V-ing form
I mustn't startle you mustn't startle he mustn't startle we mustn't startle you mustn't startle they mustn't startle	I mustn't be startling you mustn't be startling he mustn't be startling we mustn't be startling you mustn't be startling they mustn't be startling
Perfect	V-ing perfect
I mustn't have startled you mustn't have startled he mustn't have startled we mustn't have startled you mustn't have startled they mustn't have startled	I mustn't have been startling you mustn't have been startling he mustn't have been startling we mustn't have been startling you mustn't have been startling they mustn't have been startling

Interrogative form

Simple form	V-ing form
must I startle? must you startle? must he startle? must we startle? must you startle? must they startle?	must I be startling? must you be startling? must he be startling? must we be startling? must you be startling? must they be startling?
Perfect	V-ing perfect
must I have startled? must you have startled? must he have startled? must we have startled? must you have startled? must they have startled?	must I have been startling? must you have been startling? must he have been startling? must we have been startling? must you have been startling? must they have been startling?

Interro-negative form

Simple form	V-ing form
mustn't I startle? mustn't you startle? mustn't he startle? mustn't we startle? mustn't you startle? mustn't they startle?	mustn't I be startling? mustn't you be startling? mustn't he be startling? mustn't we be startling? mustn't you be startling? mustn't they be startling?
Perfect	V-ing perfect
mustn't I have startled? mustn't you have startled? mustn't he have startled? mustn't we have startled? mustn't you have startled? mustn't they have startled?	mustn't I have been startling? mustn't you have been startling? mustn't he have been startling? mustn't we have been startling? mustn't you have been startling? mustn't they have been startling?