1. It's grammatically correct, but it could be more natural. I would suggest: I didn't go out because the weather was terrible. / I didn't go because it was raining. / I didn't go out because it was cold. 2. Your meaning isn't clear. What are you trying to say? 3. I would suggest: I'm sharing the file as an attachment. / I've attached the file. Please see the attached file.

1. Sentence Correction: * Original: "The reason why I didn't go out was because the weather was not good." * Corrected: "I didn't go out because the weather was bad." 2. Usage of "Leftover": * Instead of "leftover gifts," say "extra gifts." 3. Business Email Phrases: * "I'm sharing the attached file." * "Please refer to the attached." * "Please refer to the attached file." Summary: 1. Corrected sentence: "I didn't go out because the weather was bad." 2. Use "extra gifts." 3. Use: "I'm sharing the attached file," "Please refer to the attached," or "Please refer to the attached file."

#1 is correct but contains some words that are not needed: "The reason I didn't go out was (the) bad weather". "The reason I didn't go out is that the weather was not good" #2 You can say you have no "leftover" gifts, but I'm not sure what it means. #3 The third one is perfect. The second is poor style but is commonly used. The first doesn't make sense.

1) i didn't go out because the weather was not good. You don't need to add was 2 Times and make your sentence short and meaning full. 2) yes you can use leftover instead of food.