The Conjugator
Conjugación del verbo inglés
MUST HAPPEN

Verbo regular: happen - happened - happened

Afirmación

Forma simple

Forma con V-ing

-
-
it must happen
-
-
-
-
-
it must be happening
-
-
-

Perfecto

Perfecto con V-ing

-
-
it must have happened
-
-
-
-
-
it must have been happening
-
-
-

Negación

Forma simple

Forma con V-ing

-
-
it must not happen
-
-
-
-
-
it must not be happening
-
-
-

Perfecto

Perfecto con V-ing

-
-
it must not have happened
-
-
-
-
-
it must not have been happening
-
-
-

Forma interrogativa

Forma simple

Forma con V-ing

-
-
must it happen?
-
-
-
-
-
must it be happening?
-
-
-

Perfecto

Perfecto con V-ing

-
-
must it have happened?
-
-
-
-
-
must it have been happening?
-
-
-

Forma interro-negativa

Forma simple

Forma con V-ing

-
-
must it not happen?
-
-
-
-
-
must it not be happening?
-
-
-

Perfecto

Perfecto con V-ing

-
-
must it not have happened?
-
-
-
-
-
must it not have been happening?
-
-
-