一、you must Look right before you Cross the road改成祈使句

Please look right before you cross the road.或者是Look right before you cross the road.

二、下载JDK的时候提示you must accept the license agreement before downloading,如何处理

你仔细的看一下你下载的当前选项上方，紧接着的有个协议是单项的选择，点一下 Accept License Agreement 再下载。。。

三、关于summer job experience 的英语作文

My summer job is very exciting and interesting. I found this job through my friend, I worked in a laboratory, my duty was to help assist technician to do experiments and clean up after it. I can learn more about the things you can't learn from school and book. I like this summer job.

四、mebeforeyou句子结构对吗

"mebeforeyou"不是一个句子结构，它是一个单词或词组。
单词和词组通常只包含一个主要词汇，不具备完整的语法结构，因此不能构成句子。
如果你想构建一个完整的句子，可以考虑使用完整的主语、谓语和宾语等元素。
例如："Me before you"可以被看作是一个句子，其中的主语是"我"，谓语是"在你之前"，可以表示一种优先选择的意思。