Please在句子结尾，上节课的第1/2句：

Could you say that again, please? 

Would you say that again, please? 请你再说一遍好吗？

Please在句子最后，这是我们请求别人做某事时，please最常见的位置。

Please在句子开头，上节课的第3/4句：

Please could you do that again? 请你再做一遍好吗？

Please would you say that again? 请你再说一遍好吗？

Please放在前面会让请求听起来语气更强，像是一个命令句。

Please could you do that again? 用命令句说的话是 Please do that again. 

Please在句子中间，上节课的第5/6句：

Could you please say that again? 请你再说一遍好吗？

Can we please change the subject? 我们可以换个话题吗？

Please在句子中间让请求的意味更强，句子中间的please常常会被重读。

当和成年人对话，孩子（children）提出请求或者请求同意/请求许可，孩子们常常会把please放在句子开头，而成年人对成年人不会这么说。

[孩子问老师]

Please can I leave early today, Sir?

先生，我今天能早点走吗？

[员工问老板]

Can I leave early today, please?

我今天能早点走吗？

XXX不说Please can I leave early today?