"Have you ever seen the ghost?

When I was about 10 years old, I had saw a ghost in my house.
I was studying beside the window, and I felt tired and bored, I looked out at the window. Suddenly, I felt seem I saw a woman stood outside the window, she was an old woman and she closed the window. I was very surprised but I didn't scare. I talked to my parents about a woman stood outside the window and they went out for searching her but they couldn't find her, they thought I was sick and they didn't believe in me. I didn't understand what happened to me but I thought that was the first time I saw a ghost in my life. I believed in I saw her but she didn't appear again."

Here is the story corrected:

''Have you ever seen a ghost?''

When I was about 10 years old, I saw a ghost outside my house.
I was studying by the window, and felt tired and bored, so I looked outside through the window. Suddenly, I saw a woman appear outside; she was an old woman and she closed the window. I was very surprised but I wasn't scared. I talked to my parents about the woman, and they went out searching for her, but they couldn't find her. They thought I was sick and didn't believe me. I didn't understand what had happened, but I believed I had seen a ghost. I was sure I had seen her, but she never appeared again.