judge by 和judge from有什么区别?用在句首时都是什么形式?

judge by “以……来判断,以……来看”,表示从音容,笑貌,衣着等进行判断.例如：\x0dJudging from his looks ,he may be sick.从外表看,他或许生病了.\x0djudge from…“从……看,根据……可以看出”,表示从其他方面(证据,报告,说的话等) 进行判断.例如：\x0dJudging by his accent,he must be from Guangdong.听口音,他准是个广东人.