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1·She was always there at half past eight, chatting informally to the children.

她总是八点半钟到那儿，与孩子们随意交谈。《柯林斯英汉双解大词典》

2·Half past eight o'clock at night.

晚上八点半。

3·His work starts at half past eight.

他的工作在八点半开始。

4·Is it half past eight?

现在是八点半吗？

5·I think it's half past eight or something.

我想现在是八点半左右。

6·Susan came to the party yesterday, but it was already half past eight when she turned up.

苏珊昨天来参加聚会了，但她来的时候已经八点半了。

7·Classes begin at half past eight.

课在八点半开始。

8·Classes begin at half past eight.

八点半开始上课。

9·It's half past eight now.

现在八点半了。

10·I went to school at half past eight.

我在八点半去学校。