Question

英语高手帮帮忙翻译一个简单句子，好的话加分，在线等~~~~~~~

翻译：我问他，他有多久是个司机了。
不要对话形式（用间接引语）

Answer 1

I asked him that how long has he been a driver.

Answer 2

I asked him how long he had been a driver.

Answer 3

I ask him how long he has been a driver.

Answer 4

i ask him how long he has been a driver.

Answer 5

I asked him that how long he had been a driver.