①Having collected and evaluated the information,
I help other scientists to predict where lava from the volcano will flow next and how fast. (P34)
收集和评估这些信息之后,我就帮助其他科学家一起预测熔岩接着将往何处流,流速是多少。
(1) Having done 是现在分词的完成式,在此句中作时间状语。现在分词作状语时,如果分词动作发生在主句谓语动词之前,就要用现在分词的完成式。如果分词动作与句子的主语之间是被动关系,则用 having been done,主动关系用having done。
Having suffered from heart trouble for years, his dad has to take some medicine with him whenever he goes.
(2) 分词的完成式having done不作宾补,不作定语,分词与不定式的区别主要体现在动作发生的时间上。
活用
完成句子 (1) _____________ his gloves, the doctor began to do the operation.
戴上手套后,那位医生开始做手术了。 (2) _______________, she stopped to have a break.
写完作业后,她停下来休息。 (3) _____________ the news, the woman stood there, frightened.
听到这个消息,那位女士站在那儿,吓坏了。
答案
(1) Having put on (2) Having finished her homework (3) Hearing 活用
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