Have a great week 是人们最常用的表达方式。
这两种表达方式含义相同。 “Have a great week ahead”只是增加了一个语境，说话者想表明这周很快就会到来，而且知道这周可能有某些事要发生。
**Have a great week **and I'll see you next Saturday.
I hope you all have a great week at summer camp!
Did your sister ask if you will **have a great week **or not?
**Have a great week **and stay out of trouble.
We all hope that this city will **have a great week **this week.
I don't think he is going to have a great week after that injury.
We have a great week ahead planned for all of you at this school.
I hope you all **have a great week ahead **of your big exam.
The coach told the team they have a great week ahead of them if they practice enough.
The campers knew they had a great week ahead of them, filled with exciting adventures and new friends.
The mayor told her consituents to plan for the** great week ahead**--it would be a milestone for the city.
A wise proved states that a person will never have a great week ahead of them if they do not embrace the poor weak behind them.