*************CORRECTION****************

Student: My best vacation is went to Guam.
Correct: My best vacation is  when we went to Guam.

Explanation: We use "when" to indicate time.
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Student: Two years ago, my family went to Guam.
Correct: CORRECT!

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Student: Before I rode airplane,I was very nervous. Because It was a second time I went to overseas.
Correct: Before I rode the airplane, I was very nervous because It was a second time I went to overseas.

Explanation: Use the article THE before a specific noun. We don't use "because" the start of a sentence.
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Student: When I reached at Guam, Guam was night. So I had to sleep.
Correct: When I arrived in Guam, it was night time, so I had to sleep.

Explanation: It is appropriate to use the word "arrived" than "reached" and we can use the preposition "it" to replace Guam to avoid repetition.
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Student: Next day, I went to swimming pool.
Correct: Next day, I went to the swimming pool.

Explanation: Use the article THE before a specific noun.
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Student: There were many sliding, swimming pool and snorkeling.
Correct: There were many slides, swimming pools  and snorkeling areas.

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Student: There were lots of fishes. It was so beautiful.
Correct: There were lots of fishes and it was so beautiful.

Explanation: You can use the connector "and".
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Student: Second day, I went to ocean and rode a boat. And I did snorkeling.
Correct: On the second day, I went to the ocean and rode a boat and I did snorkeling.

Explanation: we should in include the preposition "on" to indicate time. Use the article THE before a specific noun.
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Student: It was different from firstday.
Correct: It was different from the first day.

Explanation: Use the article THE before a specific noun.
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Student: On third day, I rode a ship. And I saw dolpins.
Correct: On third day, I rode a ship and I saw dolphins.

Explanation: Please check your spelling.
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Student: The dolpins follow our ship.
Correct: The dolphins followed our ship.

Explanation: Check spelling and the correct tense (past)
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Student: It was very cute and amazing.I never forget it.
Correct: It was very cute and amazing, I will never forget it.

Explanation: Use a comma for a pause and put "will" because forget is in the future tense.
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Student: On last day, I prepared to leave Guam.
Correct: On the last day, I prepared to leave Guam.

Explanation:  Use the article THE before a specific noun.

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Student: I was very sad, because Guam is very fun
Correct: I was very sad to leave, because it is very fun in Guam.

Explanation: Please include an action word to complete your sentence.
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Student: If I chance to go to Guam again, I want to see dolpins first.
Correct: If I have a chance to go to Guam again, I want to see the dolphins first.

Explanation: Use the article THE before a specific noun. It is necessary to put the word "have".
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Student: I never forget the travel.
Correct: I will never forget the trip.

Explanation: Put "will" because forget is in the future tense. "trip" is the appropriate word for your sentence.
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****************TEACHER'S COMMENT*******************

Hello, Lina! Wow! I am really happy when I was reading your homework. You are really good in making compositions. You know how to tell a good story. Please check your corrections, most of them are common mistakes. I know that you will improve on your next homework.

Have a great weekend, I'll see you again on Monday! Good job!

- Teacher Claire