to happen
Verbo regular: happen - happened- happened

Indicativo 	
Presente 	Presente continuo 	Pretérito 	Pretérito continuo 	
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doesit happen?
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isit happening?
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did it happen?
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wasit happening?
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Presente perfecto 	Presente perfecto continuo 	Pluscuamperfecto 	Pluscuamperfecto continuo 	
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hasit happened?
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hasit been happening?
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had it happened?
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had it been happening?
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Futuro simple 	Futuro continuo 	Futuro perfecto 	Futuro perfecto contínuo 	
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 will it happen?
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 will it be happening?
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 will it have happened?
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 will it have been happening?
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Condicional 	
Presente 	Presente continuo 	Passado 	Passado continuo 	
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 would it happen?
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 would it be happening?
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 would it have happened?
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 would it have been happening?
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Infinitivo 	
Imperativo 	
Infinitivo 	 	Imperativo 	 	
to happen 	 	-
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- 	 	

Participio 	
Presente 	Passado 	 	 	
happening	happened