"让他去拿"的英文表达是 "Have him go and get it."。
这句话的来源是英文动词 "have"，其含义是 "使、让、命令"。例如：
Have him do it. (让他去做。)
Have her come here. (让她来这里。)
另外，"go and get it" 是一个习惯用语，意思是 "去拿、去取"。例如：
Go and get the book. (去拿书。)
Go and get some water. (去取点水。)
这句话的来源是英文动词 "have"，其含义是 "使、让、命令"。例如：
Have him do it. (让他去做。)
Have her come here. (让她来这里。)
另外，"go and get it" 是一个习惯用语，意思是 "去拿、去取"。例如：
Go and get the book. (去拿书。)
Go and get some water. (去取点水。)