Ingles, Present perfect (50 puntos de recompensa)
Respuestas a la pregunta
Lucy: Hi, Paul. Are you having fun?
Paul: Yeah! I have never had this much fun before! What about you? Have you won a prize?
Lucy:Yes, I have. I have won a teddy bear! Look!
Paul: Great! I have not played any games yet, but I have bought some hot dogs. Do you want one?
Lucy: Yes, please! Have you had a ride on the roller coaster?
Paul: No, I haven't. Is it good?
Lucy: It's fantastic! Let's go on it now! Where's David? Have you seen him?
Paul: Yes, he went over there to watch the fireworks.
Lucy: Oh, I love fireworks! Haven't they started yet?
Paul: Not yet. Come on!
Explicación:
En el presente perfecto, para formarse se usa el auxiliar have con el significado de haber y un verbo en participio (tercera forma del verbo, en español su terminación es de -ido, -ado) su estructura es (positiva):
Sujeto + have / has + verbo participio + complemento
En negativo, basta con agregar "not" delante de have / has.
En interrogativo solo intercambias el orden del sujeto con have / has.