分詞做狀語和狀語從句互換問題
eg: After he had had lunch, he had a cup of tea.這個可以變?yōu)? Having had lunch,he had a cup of tea.這個是對的吧, 這種情況的互換有什么說法嗎? after 可以,before不可以,有這種說法嗎?
eg： Tom had visited his uncle, before he went home. 這種帶before 的時間狀語從句想變成分詞做狀語就不和邏輯了啊,求教求教!
補充： 狀語從句有時間，原因，條件，讓步等等，是不是均適合用分詞做狀語的形式來改寫。 有哪些特例。
如： 由while，when，after引導(dǎo)的時間狀語從句都可以用分詞做狀語來替代，而由before引導(dǎo)的則不成。