如果他早回来半小时就不会遇上堵车了 怎么翻译

If he had come back half an hour earlier it won't be a trouble of traffic jam.
如果他早回来半小时就不会遇上堵车了

if he had come back half an hour earlier,he wouldn't be caught in the tarffic jam.

If only he had not come back half an hour 。

He wouldn't meet the traffic jam if he had come back half an hour early.