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重点句型
1. Suddenly, by the light of the lightning, we saw something in the middle of the river.
突然间，借着闪电的光亮我们看到河中间有东西。
2. It was quite dark,but I could see a man lying on the floor, tied up with rope.
四周都很黑，但我能看见一个人被绳子捆着躺在地板上。
3. "He sounds as if he's going to die of fright!"
“听起来他就要被吓死了！”
4. As they make their way down the river, they have a number of exciting adventures.
随着他们顺河而下，他们经历了许多刺激的冒险。
5. He arrived in New Orleans without a penny in his pocket only to find that there were no boats for South America.
他身无分文地来到新奥尔良，结果发现没有去南美洲的船。
6. Forced to change his plans, he worked for several years as a pilot on a steamboat...
迫不得已他只好改变了计划，在一艘汽船上当了好几年领航员……
句型探究
1. "He sounds as if he's going to die of fright!"
“听起来他就要被吓死了！”
sound为连系动词,意为“听起来”，后接表语。其本身有一定的词义，但不能独立作谓语，必须与表语一起构成复合谓语。常见的连系动词有：be, look, seem, feel, keep, smell, taste, go等。
He seems to be quite happy.
他看起来似乎十分快乐。
look, sound等连系动词后常接as if / as though 引导的表语从句表推测，从句中有时用虚拟语气，意为“看起来/听起来好像……”
He looks as if he were ill.
他看起来像是病了。
He rushed out of the house as if angry.
他冲出房间，好像很生气的样子。
