Please let me know if

Please let me know if

1.Please let me know if you need any help.
 
　　如果你需要任何协助，请让我知道
 
　　2.Please let me know if you want the job.
 
　　如果你想要那份工作，请让我知道
 
　　3.Please let me know if you are hungry or thirsty.
 
　　如果你饿了或是渴了，请让我知道
 
　　4.Please let me know if you would like to go with me.
 
　　如果你想要跟我去，请让我知道
 
　　5. Please let me know if you are not satisfied.
 
　　如果你不满意，请让我知道