其結構是固定的，意思上的主語並不是句子的主語。
generally speaking 一般說來
talking of (speaking of) 說道
strictly speaking 嚴格的說
judging from 從…判斷
all things considered 從整體來看
taking all things into consideration 全面看來
judging from his face, he must be ill. 從他的臉色看，他一定是病了。
generally speaking, dogs can run faster than pigs. 總的來說，狗比豬跑得快。 (speaking 並不是dogs 的動作)