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考研英语语法大全之【现在分词和过去分词的区别】
如果现在分词的动作在谓语动作之前发生,现在分词要用完成形式,但意思仍然是主动的。
例如:
Having watered the vegetables,they began to pick up the Apples。=After they had watered the vegetables,they began to pick up the apples。他们浇完了蔬菜之后就开始摘苹果。
Having finished the work,he packed his tools and left。完工后,他收拾起工具走了。
分词做状语时,前面可用连词或介词。
例如:
After eating my dinner quickly,I went to see Jim off。我赶快吃过晚饭就去给吉姆送行。
Though built before the Second World War,the engine is still in good condition。尽管是在二战以前建的,这引擎仍然处于良好状态。
Unless paying by credit card,please pay in cash。如果不用信用卡付款,请用现金付。
Tom will never do this unless compelled。汤姆永远也不会干这种事,除非被逼无奈。
She’s been quite different since coming back from America。从美国回来后,她大变了。