新北模具厂:看看对不对。

Last summer holiday,I went to Bai Hai with my parents.Bai Hai is a very beautiful and clean seaside city. Here（1——There） are(2——is) blue sky,wide sea ,gold(3——golden) beach and delicious food.Father and I went to swim,(4加and)mother played volleyball with friends.We are(5——were) very happy ,(6加and)we enjoy(7——enjoyed ourselves in) Bei Hai.
1）There be 句式，意为“有...”
2）There be 句式里“be”的单复数与其后第一个名词的单复数一致
3)gold是名词，金子；golden是它的形容词，“金色的”
4）句号在句中不起作用，句中用句号隔开，原句仍是一句话，加and才能成为两句话。此处前后有两套主谓语，应为两句话。
5）全文过去时，此处不是客观事实，是描写当时心理状态，应为过去时
6）同4
7）enjoy应为过去式，enjoy oneself=have a good time意为“玩的很愉快，度过了很愉快的时光”

只知道这些了，再听听别人意见吧

Bai Hai is a very beautiful city with clean seaside.

Here there are......golden beach......

We were......we enjoyed......

Last summer holiday,I went to Bei Hai with my parents.Bei Hai is a very beautiful and clean seaside city. Here are blue sky,wide sea ,gold beach and delicious food.Father and I are went swimming,mother playing volleyball with friends.
We are very happy ,we enjoy Bei Hai.

city by the seaside.
father and i went to swim,while mother played volleyball with her friends.
we were happy .
we enjoyed...
另外，Bai hai 不知是哪里？是误写吗？是不是北海？请恕我孤陋寡闻。