Grammar — The Causative (Have Something Done)

"My father had the car mended."

ما المقصود بالـ Causative؟ وكيف يختلف عن المبني للمجهول؟

"That reminds me. I must have my shoes repaired."

لماذا repaired وليس repair بعد have my shoes؟

"My mother goes to that shop. She has the carpets cleaned there."

كيف نحوّل هذه الجملة إلى الماضي؟ وكيف نستخدم get بدل have؟

"Huda had her bag pulled off her shoulder."

هل هذه الجملة تعني أن هودا طلبت ذلك؟ وما الاستخدام الآخر للـ Causative؟

"What can you have done if you go to a barber? — I can have my hair cut."

ما الفرق بين I cut my hair وI had my hair cut وMy hair was cut؟