reported speech - cambios en el tiempo verbal

DIRECT SPEECH ESTILO DIRECTO	REPORTED SPEECH ESTILO INDIRECTO
PRESENTE SIMPLE	PASADO SIMPLE
PRESENTE CONTINUO	PASADO CONTINUO
PRESENTE PERFECTO	PASADO PERFECTO
PASADO SIMPLE	PASADO PERFECTO

DIRECT SPEECH ESTILO DIRECTO	REPORTED SPEECH ESTILO INDIRECTO
CAN	COULD
WILL	WOULD
MUST / HAVE TO	HAD TO
MAY	MIGHT