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When I was little my dad brought me home a goldfish. I was delighted but something soon went wrong. My parents were talking to some friends who had come to visit us, and I was a bit bored so I went into the kitchen to see my goldfish. The packet of goldfish food was standing on the table next to the goldfish bowl and I picked it up to look at it. My parent s had told me never to feed the goldfish, but I thought it looked a bit hungry so I decided to feed it. Unfortunately the lid came off the packet of goldfish food, and the entire contents fell into the water. I was really embarrassed and I felt incredibly guilty because I had been so disobedient. I ran into the living room crying and crying and eventually I told my parent what had happened. My goldfish survived, though, and went on to live for another two years.

Two more sentences.
Had you read the book before you saw the film?
I couldn't open the door because I forgot my keys.

Thanks in advance.
Comments  
When I was little my dad brought me home a goldfish. I was delighted but something soon went wrong. My parents were talking to some friends who had come to visit us, and I was a bit bored so I went into the kitchen to see my goldfish. The packet of goldfish food was standing on the table next to the goldfish bowl and I picked it up to look at it. My parent s had told me never to feed the goldfish, but I thought it looked a bit hungry so I decided to feed it. Unfortunately the lid came off the packet of goldfish food, and the entire contents fell into the water. I was really embarrassed and I felt incredibly guilty because I had been so disobedient. I ran into the living room crying and crying and eventually I told my parent what had happened. My goldfish survived, though, and went on to live for another two years.

Two more sentences.
Had you read the book before you saw the film?
I couldn't open the door because I forgot my keys.

Could you check at least this in blue?
The tenses you used are OK.

The last sentence should be smth like: I couldn't open the door because I had forgotten the keys in the car. Or: I couldn't open the door as I didn't have the keys.
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Thank you for the reply.

If I sholud use the Past Perfect in this centence:
I couldn't open the door because I had forgotten my keys.

Why in this sentence from a book is Past Simple?
She didin't go to the doctor's because she forogt her appointment.