英文文法問題 有一些英文的句型我不知道是對還是錯,如果是錯的請幫忙改正並說明原因。?

1, Each student is happy to meet the new teacher.
錯
Every student is happy to meet the new teacher.
每個學生=所有學生(但句形不會說All students，因為重點不是集體意識而是表達每個人的感覺同樣)
(中文思想=each student，英文思想=every student)

2, Everybody were present at the party last night.
OK.但句式意義不大，要看everybody的含意或代表的是甚麼。例如everybody前句是指全學校的人，或某宿舍的宿生，或某學會的會員等。

3, Keeping early hours are good for your health.
OK.

4, What he said have proved to be true.
OK.

5, He seen the accident yesterday.
錯
He saw the accident yesterday.

6, I went to the museum, and we had a good time there.
尚可。中間,沒必要，I和we的兩個主詞需要修改或預設名定，而句尾寫多了there是中文型。英文人不會說/寫there.因為句型已指明去的地方，而你的感覺或分享必然是那地方的經歷，除非有些在there的獨特情況或指那地方裏的某地點才會特別寫there.
例：
I went to the museum with my classmates and we had a good time there helping cataloging ancient bones.
I went to the museum with my family and we had a good time there meeting with the Director to see his private collections.

1. Each student is happy to meet the new teacher. ☓
句子要修正為
All Students are happy to meet the new teacher. ✓

2. Everybody were present at the party last night. ☓
句子要修正為
Everyone have received present at the party last night. ✓

3. Keeping early hours are good for your health. ☓
句子要修正為
Keeping early hours is good for your health. ✓

4. What he said have proved to be true. ☓
句子要修正為
What he said has proved to be true. ✓

5. He seen the accident yesterday. ☓
句子要修正為
He saw the accident yesterday. ✓

6. I went to rhe museum, and we had a good time there. ☓
句子要修正 還有你把the拼成rhe 是拼錯了
We went to the museum, and we had a good time there. ✓

"I" went to the museum, and "we" had a good time there. ←← "we" 是指誰？