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Hi! I like to practice writing in english. If you can correct my grammar, I would be so happy.
Today I was home alone, because my mother and sister went out for a while. In the afternoon I will watch the soap opera, cook something, and go out with my dog. My dog is very beautiful, it´s twelve years old, my dog is black and of small breed.

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Hi ! i like practice writing in english, if you can correct, I would be so happy.
Today i was alone in house, cause my mother and sister go out for six hours. afternoon i see the novel, turn on the stove, go out with my dog, it is a dog very beautiful, it´s twelve years old, it´s to race small, it´s the black color.

Hi! I like to practice writing in english, if you can correct it I would be very happy. 

Today I was home alone, because my mother and sister went out for six hours. In the afternoon I watched a tv show, (Supongo que quería decir una telenovela) turned on the stove, and went out with my dog, it is twelve years old and very beautiful. It is a small breed and has black fur. 

¡Muy bien trabajo! Keep practicing. I guessed on some of what you said, hopefully this helped. :)

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Hi ! I like to practice writing in English, if you can correct (my mistakes), I'll be so happy.
Today, I was at home alone, because my mother and sister were out for six hours. This afternoon/in the afternoon, I read a novel, turned on the stove, and went out with my dog. It is a dog very beautiful dog, it's twelve years old, it´s to race small (? - it likes to do little races?), it´s the black (in color).

Good job!! :D

Sorry if there was a misunderstanding with the tenses relating to "this afternoon/in the afternoon".

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Hi ! i like practicing writing in english, if you can correct it, I would be so happy.
Today i was alone at home, cause my mother and sister went out for six hours. In the afternoon i watched a soap opera, turn on the stove, went out with my dog, it is a very beautiful dog, it´s twelve years old, it´s a small race, it´s the black color.