The Conjugator
Conjugación del verbo inglés
MUST HAPPEN

Verbo regular: happen - happened - happened

Afirmación

Forma simple

Forma con V-ing

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

Perfecto

Perfecto con V-ing

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

Negación

Forma simple

Forma con V-ing

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

Perfecto

Perfecto con V-ing

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

Forma interrogativa

Forma simple

Forma con V-ing

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

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?
-
-
-