五年级下册英语陕旅版第八单元的重点句子可能包括以下几个方面：

1. 日常交际用语- How do you do? 你好吗？- Nice to meet you. 很高兴见到你。

- What's your name? 你叫什么名字？- How old are you? 你多大了？- Where do you come from? 你来自哪里？

2. 学习生活用语- I like English very much. 我非常喜欢英语。- What day is it today? 今天是星期几？- Today is Monday. 今天是星期一。- We have English class on Monday. 我们星期一上英语课。

3. 询问和描述天气- What's the weather like today? 今天天气怎么样？- It's sunny/cloudyainy/windy. 天晴/多云/下雨/刮风。- I like sunny days. 我喜欢晴天。- It's very hot/cold today. 今天很热/冷。