(1) do so 可以替代动词加宾语,也可以替代动词加状语。 She said she would go with me, but she didn’tdo so.她说她要和我一起去,但她没有。 Just finish off watering the flowers. And let me know when youhave done so.赶快较完花,等你浇完时通知我。 (2) do so...