Solución del ejercicio sobre Presente Perfecto (Present Perfect Tense)

Si ya has ejercitado sobre el Presente Perfecto con las siguientes oraciones, verifica que tus respuestas sean las correctas con la siguiente solución:

The electrician has repaired the lighting system. Has the electrician repaired the lighting system? The electrician has not repaired the lighting system. A thief has stolen Mary’s purse. Has a thief stolen Mary's purse? A thief has not stolen Mary's purse. They have accepted credit cards. Have they accepted credit cards? They have not accepted credit cards. We have sung different songs at the camp. Have we sung different songs at the camp? We have not sung different songs at the camp. The player has hit me with the ball. Has the player hit me with the ball? The player has not hit me with the ball. The students have printed the magazine. Have the students printed the magazine? The students have not printed the magazine. The children have swum in the lake. Have the children swum in the lake? The children have not swum in the lake. The inspector has showed us the secret files. Has the inspector showed us the secret files? The inspector has not showed us the secret files. Susan has got $50 as a prize. Has Susan got $50 as a prize? Susan has not got $50 as a prize. The passengers have watched many movies. Have the passengers watched many movies? The passengers have not watched many movies. He has built a new department. Has he built a new department? He has not built a new department. Jonathan has bought a new car and a new house. Has Jonathan bought a new car and a new house? Jonathan has not bought a new car and a new house. The President has visited the museum. Has the President visited the museum? The President has not visited the museum. The secretary has asked the boss to sign the letters. Has the secretary asked the boss to sign the letters? The secretary has not asked the boss to sign the letters. Sarah has worked for a building company. Has Sarah worked for a building company? Sarah has not worked for a building company. The workers have cleaned the theatre. Have the workers cleaned the theatre? The workers have not cleaned the theatre. Jane has cut her finger. Has Jane cut her finger? Jane has not cut her finger. Frank has fixed his bicycle. Has Frank fixed his bicycle? Frank has not fixed his bicycle. Peter has eaten a lot of sandwiches. Has Peter eaten a lot of sandwiches? Peter has not eaten a lot of sandwiches. My brothers have spent their holidays abroad. Have my brothers spent their holidays abroad? My brothers have not spent their holidays abroad.