我正在大街上行走時，遇到了一位老朋友。(walking和謂語動詞met同時發(fā)生)Having finished the letter, he went to post it.他寫完信后就把它寄了出去。(having finished是先發(fā)生的，went是后發(fā)生的)2．現(xiàn)在分詞的語態(tài)使用現(xiàn)在分詞的主動式還是被動式，這主要取決于現(xiàn)在分詞和句子主語之間的關(guān)系。句子的主語就是分詞的邏輯主語。Having been shown around the factory, they were very happy.(現(xiàn)在分詞的被動式)被領(lǐng)著參觀了工廠后，他們很高興。Having finished his homework, he went to bed.(現(xiàn)在分詞的主動式)完成了作業(yè)后，他上床睡覺。Seeing nobody at home, he decided to leave them a note.看到?jīng)]人在家，他決定給他們留個便條。Having been told for several times, he still couldn't understand the rules.雖然被告訴了好幾次，他還是不明白規(guī)則。Having received his reply, she rang him up.收到他的回信后，她給他打了電話。Being talked to, you should look into the eyes of the person.和別人說話時，你應(yīng)該看著對方的眼睛。Having been asked to work overtime that evening, I missed a wonderful film.由于那天晚上被要求加班，我錯過了一場精彩的電影。八、動詞­ing形式的否定形式及動詞­ing形式的復(fù)合結(jié)構(gòu)1．動詞­ing形式的否定形式通常是在其前加not，帶有邏輯主語時 not應(yīng)放在邏輯主語和動詞­ing形式之間。