English verb conjugation MUST CONCENTER

Regular verb: concenter - concentered - concentered

Affirmation

Simple form

I must concenter
you must concenter
he must concenter
we must concenter
you must concenter
they must concenter

V-ing form

I must be concentering
you must be concentering
he must be concentering
we must be concentering
you must be concentering
they must be concentering

Perfect

I must have concentered
you must have concentered
he must have concentered
we must have concentered
you must have concentered
they must have concentered

V-ing perfect

I must have been concentering
you must have been concentering
he must have been concentering
we must have been concentering
you must have been concentering
they must have been concentering

Negation

Simple form

I mustn't concenter
you mustn't concenter
he mustn't concenter
we mustn't concenter
you mustn't concenter
they mustn't concenter

V-ing form

I mustn't be concentering
you mustn't be concentering
he mustn't be concentering
we mustn't be concentering
you mustn't be concentering
they mustn't be concentering

Perfect

I mustn't have concentered
you mustn't have concentered
he mustn't have concentered
we mustn't have concentered
you mustn't have concentered
they mustn't have concentered

V-ing perfect

I mustn't have been concentering
you mustn't have been concentering
he mustn't have been concentering
we mustn't have been concentering
you mustn't have been concentering
they mustn't have been concentering

Interrogative form

Simple form

must I concenter?
must you concenter?
must he concenter?
must we concenter?
must you concenter?
must they concenter?

V-ing form

must I be concentering?
must you be concentering?
must he be concentering?
must we be concentering?
must you be concentering?
must they be concentering?

Perfect

must I have concentered?
must you have concentered?
must he have concentered?
must we have concentered?
must you have concentered?
must they have concentered?

V-ing perfect

must I have been concentering?
must you have been concentering?
must he have been concentering?
must we have been concentering?
must you have been concentering?
must they have been concentering?

Interro-negative form

Simple form

mustn't I concenter?
mustn't you concenter?
mustn't he concenter?
mustn't we concenter?
mustn't you concenter?
mustn't they concenter?

V-ing form

mustn't I be concentering?
mustn't you be concentering?
mustn't he be concentering?
mustn't we be concentering?
mustn't you be concentering?
mustn't they be concentering?

Perfect

mustn't I have concentered?
mustn't you have concentered?
mustn't he have concentered?
mustn't we have concentered?
mustn't you have concentered?
mustn't they have concentered?

V-ing perfect

mustn't I have been concentering?
mustn't you have been concentering?
mustn't he have been concentering?
mustn't we have been concentering?
mustn't you have been concentering?
mustn't they have been concentering?

Page top