que es el prresente perfecto para que sirve y que expresa y 10 ejemplos en interrogativo negativo, positivo
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El presente perfecto se usa para acciones en el pasado que tienen vigencia en el presente
Estructura
afirmacion: sujeto + auxiliar (to have)+ participio pasado
negacion : sujeto + auxiliar (to have) + "not" participio pasado
preguntas: verbo auxiliar + sujeto + participio pasado
Ejemplos:
_I've talked to peter
_She has gone to work
_Have you been to London?
_Our football team has won the championship
_Hasn't you arrived yet?
_I haven't loved anyone else since the day I met you
_Have scientists succeded in cury the cancer?
_Haven't you finished your homework yet?
_He has learned to be more patient.
Estructura
afirmacion: sujeto + auxiliar (to have)+ participio pasado
negacion : sujeto + auxiliar (to have) + "not" participio pasado
preguntas: verbo auxiliar + sujeto + participio pasado
Ejemplos:
_I've talked to peter
_She has gone to work
_Have you been to London?
_Our football team has won the championship
_Hasn't you arrived yet?
_I haven't loved anyone else since the day I met you
_Have scientists succeded in cury the cancer?
_Haven't you finished your homework yet?
_He has learned to be more patient.
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