现在分词表示主动和进行
过去分词喊培表被动和完成。
如卜渗：
She sat there reading a novel.她坐在那里看小说。
Not having done it right，I tried again.我由于没有做对，所以郑弊唯又试了试。
The concert given by their friends was a success.他们朋友举行的音乐会大为成功。
have stoppedhim from getting at books.
ing. For six weeks I’ve been anywhere between
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