考研英语语法大全之【分词】

过去分词只有一般式，表示在谓语动词所表示的动作之前发生的动作。过去分词(及物动词)本身可以表示被动的含义，因而没有别的被动形式。

例如：

Having failed three times, he didn’t want to try again. (=As he had failed three times, he didn’t want to try again.) 他失败了三次，不想再干了。(having failed 表示发生在前的动作)

Walking along the sands, Crusoe saw in the sand the mark of a man’s foot. (=While he was walking along the sands, Crusoe…) 克鲁索沿着沙滩走的时候，看见沙上有人的脚印。(walking 表示同时发生的动作)

The question being discussed seems important. (=The question is being discussed. It seems important.) 正在讨论的问题似乎很重要。

The old days are gone. 旧时代一去不复返了。(gone 表示完成的状态)

I had my hair cut yesterday. 我昨天理发了。(cut 是及物动词的过去分词，表示“被人理发”。)

分词的否定形式是在分词短语前面加上not, never等否定词构成。

例如：

Not fearing the fire, the child touched and got a finger burnt. 小孩儿不知道怕火，用手去摸，把手指烫了。

Not knowing how to find the subway, I asked a policeman for help. 我不知道怎样找到地铁，就去找警察帮忙。