Hi

Hi there my dear [이름]!

Thank you for sending me this.

I\'m so sorry to hear about your lost.

You made a good decision to help it out of its pain.

Cheer up! You can get another pet, if you like. That\'s part of life, though it\'s just so sad. T.T

T. Shanee^^

 Here are my corrections for you:

 My dog died yesterday so I couldn\'t have our lesson.

>> CORRECT

OR> My dog passed away yesterday so I was not able to come to class.

 Vet said she had just a day to live but we didn\'t want her to put to sleep.

>> The vet said he only had a day to live but we didn\'t want her to be put to sleep.

 I wanted her to take a rest at our sweet home during a day, but she looked really painful so we decided to put her to sleep from misery.

>> I wanted her to take a rest at our sweet home during that day, but she really looked in pain so we decided to put her to sleep and out from it\'s misery.

I don\'t know if It was a right choice.

>> CORRECT

OR> I was hesitant about that choice.

When we were staring her during her rest time at home, suddenlty she opened her eyes and tried to stand up to look us.

>> When we were staring at her during her rest time at home, she opened her eyes suddenly and tried to stand up to look at us.

And then she stared us for a while and licked mom\'s face.

>> And then she stared at us for a while and licked my mom\'s face.

She seemed like saying good bye to us.

>> She seemed like she is saying good bye to us.
I really miss her until now.

>> CORRECT

OR> I really miss her up to this moment

And I don\'t know if I could answer your call today because Mom and I will attend my dog\'s funeral with my aunt Sung,mom\'s older sister.

>> CORRECT

OR> I\'m not sure about having class with you today since I will attend my dog\'s funeral.

 Ofcourse people who think a dog as JUST A DOG must think that we are tottly crazy or funny, but she was one of our famliy members, not just a dog doing cute things like a toy.

>> Of course people who think a dog as JUST A DOG must think that we are totally crazy or funny, but she was one of our family members, not just a dog doing cute things like a toy. 

In addition, I couldn\'t help delaying a surgery to the next week.

>> In addition to that, I couldn\'t help delaying the surgery for next week.