高中英语第三册Unit3 Under the sea教案
6. I looked down into the water and could see Old Tom swimming by the boat, showing us the way.
我低头朝水中看去，看到老汤姆正在船边游着，为我们引路。
swimming by the boat 在句中作宾语补足语，与宾语Old Tom 存在逻辑上的主谓头系。
I saw Jack crossing the street.
我看见杰克正在穿过街道。
7. A few minutes later, there was no Tom, so George started beating the water with his oar and there was Tom, circling back to the boat, leading us to the hunt again.
circling back to the boat; leading us to the hunt again是现在分词短语作状语。
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