English verb conjugation
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Regular verb: overlook - overlooked - overlooked

Affirmation

Simple form	V-ing form
I must overlook you must overlook he must overlook we must overlook you must overlook they must overlook	I must be overlooking you must be overlooking he must be overlooking we must be overlooking you must be overlooking they must be overlooking
Perfect	V-ing perfect
I must have overlooked you must have overlooked he must have overlooked we must have overlooked you must have overlooked they must have overlooked	I must have been overlooking you must have been overlooking he must have been overlooking we must have been overlooking you must have been overlooking they must have been overlooking

Negation

Simple form	V-ing form
I mustn't overlook you mustn't overlook he mustn't overlook we mustn't overlook you mustn't overlook they mustn't overlook	I mustn't be overlooking you mustn't be overlooking he mustn't be overlooking we mustn't be overlooking you mustn't be overlooking they mustn't be overlooking
Perfect	V-ing perfect
I mustn't have overlooked you mustn't have overlooked he mustn't have overlooked we mustn't have overlooked you mustn't have overlooked they mustn't have overlooked	I mustn't have been overlooking you mustn't have been overlooking he mustn't have been overlooking we mustn't have been overlooking you mustn't have been overlooking they mustn't have been overlooking

Interrogative form

Simple form	V-ing form
must I overlook? must you overlook? must he overlook? must we overlook? must you overlook? must they overlook?	must I be overlooking? must you be overlooking? must he be overlooking? must we be overlooking? must you be overlooking? must they be overlooking?
Perfect	V-ing perfect
must I have overlooked? must you have overlooked? must he have overlooked? must we have overlooked? must you have overlooked? must they have overlooked?	must I have been overlooking? must you have been overlooking? must he have been overlooking? must we have been overlooking? must you have been overlooking? must they have been overlooking?

Interro-negative form

Simple form	V-ing form
mustn't I overlook? mustn't you overlook? mustn't he overlook? mustn't we overlook? mustn't you overlook? mustn't they overlook?	mustn't I be overlooking? mustn't you be overlooking? mustn't he be overlooking? mustn't we be overlooking? mustn't you be overlooking? mustn't they be overlooking?
Perfect	V-ing perfect
mustn't I have overlooked? mustn't you have overlooked? mustn't he have overlooked? mustn't we have overlooked? mustn't you have overlooked? mustn't they have overlooked?	mustn't I have been overlooking? mustn't you have been overlooking? mustn't he have been overlooking? mustn't we have been overlooking? mustn't you have been overlooking? mustn't they have been overlooking?