以（有时意义相同，而有时则相去甚远）。
When he heard the strange noise，he stopped to have a look at the car. Teacher：Stop talking.Let’s begin.
3.不定式、现在分词作宾语补足语的不同在于前者表整个过程，后者表正在发生。 The police saw the thief come into the room and recorded all this with a camera. We heard them quarrelling when I passed their room.
4.注意现在分词与动名词和现在分词与过去分词作定语的不同。 如：a sleeping boy；a sleeping car；an exciting game；the excited people 5.作状语时现在分词和过去分词的区别。 She stood there waiting for the bus.
Seen from the hill，our city looks more beautiful.
6.结合动词的基本时态，分析掌握非谓语动词的时态和语态，尤其是完成被动式。 The book is said to have been translated into many languages. The plan having been made，he decided to carry it out at once.
1.______ with a difficult situation, Arnold decided to ask his boss for advice. A.To face B.Having faced C.Faced D.Facing
2.You should understand the traffic rule by now. You’ve had it ______ often enough. A.explaining B.to explain C.explain D.explained
3.I don’t want ______ like I’m speaking ill of anybody, but the manager’s plan is unfair. A.to sound B.to be sounded
C.sounding D.to have sounded
4.The old man，______ abroad for twenty years，is on the way back to his motherland. A.to work B.working C.to have worked D.having worked
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