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When was last time you were ill or had an accident? What happpend? How did you feel?

May be it wasn't the last time but I'm sure I won't forget it.
I had a car accident when I was 12. I was crossing the street with my headphones on listening to music on full volume. I didn't hear the car coming towards me. All I remember is waking up at the hospital in pain. I had broken my left arm and my entire body was covered in bruises. My mother was very worried. I had luck. I could have been hurt much worse.
At the hospital I was bored to death. I had to stay in there for five days and with my arm broken there wasn't much to do.
Since the accident I don't cross a street without making it clear that no car is going to crush into me. I have learned my lesson.
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I would make a few, small corrections to your essay:

When was last time you were ill or had an accident? What happpened? How did you feel?

I had a car accident when I was 12. [Note: Start with the event and add in the opening.] Maybe it wasn't the last time I was hurt but I'm sure I won't forget it. I was crossing the street with my headphones on listening to music on at full volume. I didn't hear the car coming towards me. All I remember is waking up at the hospital in pain. I had broken my left arm and my entire body was covered in bruises. My mother was very worried. I was lucky. had luck. I could have been hurt much worse.

At the hospital I was bored to death. I had to stay in there for five days and, with my arm broken, there wasn't much to do. [Note: Say more here...this paragraph is too thin as is.]

Since the accident, I don't cross a street without checking to see making it clear that no car is going to crush into me. I have learned my lesson.

Note: "Making it clear" is to explain something. Clear?
Comments  
Students: We have free audio pronunciation exercises.
Add to my fuller remarks: "crash into me" or "crush me."

i wont forget anyone easily