Diary

We celebrated to my son's pass the swim level test. He fanally mastered all of swim skill. Many kids also got a korea swimming certification from association. But it was worth it for our. because he overcame his fear of water.It seems that He is getting heathier after learning to swim and he felt confident himself. I just was surprised he get into water inside. So we had a good dinner and held a party to him.

We celebrated to my son's pass the swim level test. He fanally mastered all of swim skill. Many kids also got a korea swimming certification from association. But it was worth it for our. because he overcame his fear of water.It seems that He is getting heathier after learning to swim and he felt confident himself. I just was surprised he get into water inside. So we had a good dinner and held a party to him.
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Here are the corrections:

1. Original: We celebrated to my son's pass the swim level test.
   Corrected: We celebrated my son's passing the swim level test.
   Explanation: "Celebrate" is not followed by "to" and we say "passing" (a gerund) instead of "pass."

2. Original: He fanally mastered all of swim skill.
   Corrected: He finally mastered all the swimming skills.
   Explanation: “Fanally” → “finally” (spelling); “all of swim skill” → “all the swimming skills” (correct plural and article).

3. Original: Many kids also got a korea swimming certification from association.
   Corrected: Many kids also received a Korean swimming certification from the association.
   Explanation: Capitalization: “Korea” → “Korean”; missing articles: “a Korean swimming certification” and “the association.”

4. Original: But it was worth it for our.
   Corrected: But it was worth it for us.
   Explanation: "Our" is a possessive adjective and cannot stand alone. It should be "us" (object pronoun).

5. Original: because he overcame his fear of water.
   Corrected: because he overcame his fear of water. ✅
   Explanation: Correct, but this should be joined to the previous sentence for fluency.

6. Original: It seems that He is getting heathier after learning to swim and he felt confident himself.
   Corrected: It seems that he is getting healthier after learning to swim, and he feels more confident.
   Explanation: “Heathier” → “healthier” (spelling); “he felt confident himself” → “he feels more confident” (tense and phrasing correction).

7. Original: I just was surprised he get into water inside.
   Corrected: I was just surprised that he got into the water.
   Explanation: Word order corrected; “get” → “got” (past tense); “water inside” is unclear, so revised to natural phrasing.

8. Original: So we had a good dinner and held a party to him.
   Corrected: So we had a nice dinner and held a party for him.
   Explanation: We say “a party for someone,” not “to someone.”

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Final Edited Version:

We celebrated my son's passing the swim level test. He finally mastered all the swimming skills. Many kids also received a Korean swimming certification from the association. It was worth it for us because he overcame his fear of water. It seems that he is getting healthier after learning to swim, and he feels more confident. I was just surprised that he got into the water. So we had a nice dinner and held a party for him.