Ejercicios de tiempos verbales

Presente perfecto Forma positiva: I have worked for my uncle. She has finished her homework. I have to go, we have talked for more than two hours. We have visited them once a week for the last year. He has returned my car at last. It has rained once a week for the last month. They have completed the project. I have cooked something special for you I have worked in that firm for many years. We have loved each other for twenty years. He has read the book that you gave me yesterday. She has spoken with him several times. We have lent money to you many times. They have lost my book. He has forgotten what I said I have been here before. We have forgiven what she did. We have been in this city for five years You have slept for more than fourteen hours My cousin has gone to Europe to study She has told me what you said She has seen every show in the city I have seen that movie several times He has given up the tournament I have forgotten all my problems   Forma negativa: I haven't worked for my uncle. She hasn't finished her homework. I haven't to go, we haven't talked for more than two hours. We haven't visited them once a week for the last year. He hasn't returned my car at last. It hasn't rained once a week for the last month. They haven't completed the project. I haven't cooked something special for you. I haven't worked in that firm for many years. We haven't loved each other for twenty years. They haven't lost my book. He hasn't forgotten what I said I haven't been here before. We haven't forgiven what she did. We haven't been in this city for five years You haven't slept for more than fourteen hours My cousin hasn't gone to Europe to study She hasn't told me what you said She hasn't seen every show in the city I haven't seen that movie several times He hasn't given up the tournament I haven't forgotten all my problems   Forma interrogativa: Have I forgotten all my problems?