请问以下英文句子有语法错误吗？

Question

should keep good mood all the day!

Answer 1

YOU SHOULD KEEP IN A GOOD MOOD THE ALL（WHOLE） DAY!

ALL THE DAY 明显不合适， 其次， KEEP GOOD MOOD也是错的， A GOOD MOOD~
最后缺少主语。

一般外国人会说THE WHOLE DAY INSTEAD OF ALL DAY~ ， 用词习惯而已。

Answer 2

没有错误的

Answer 3

你好：为你提供精确解答

should去掉，或者加上主语。

谢谢，不懂可追问~~~~~~~~~追问

I should keep a good mood all the day？

追答

一般是加上you/us

翻译为：你们(我们）应该时刻保持好的情绪。

追问

I must keep a good mood all the day？

追答

情态动词should翻译为应该，must翻译为必须。

理论上两个都可以用。

本回答被提问者采纳

Answer 4

keep good mood all the day or you should keep good mood all the day, should keep good mood all the day doesn't make sense because it isn't a completed sentence