Hi Hyeon Yeong. You did a nice job sharing your thoughts simply and clearly. Your sentences show your feelings and preferences well. Just remember to include small words like is and the right prepositions to make your ideas complete. Keep practicing expressing your opinions. I will keep doing my best to help you become more confident and natural when using English. Youre doing well, so keep going.
~ T. Lia
I think my dog very cute
>> I think my dog is very cute.
My opinion is a fall better than at winter
>> In my opinion, fall is better than winter.