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因为他很累，所以他一边看书一边打盹。
As he was very tired, he nodded off over his reading.
meanwhile adv. 同时
meanwhile = at the same time = in the same time
用法和 however 一样,不能连接两个句子,但是意思上有承接概念
夏娃在剪草，亚当种玫瑰。.
Eve was cutting the grass, and meanwhile Adam was planting roses.
★shake（shook，shaken）
① vt.&vi. 摇，摇动，抖动
Thompson先生摇了摇他的头。
Mr. Thompson shook his head.
他的手一直在发抖。
His hands are shaking.
② vt. 同……握手
丹和他握了握手
Dan shook hands with him.=Dan shook him by the hand.=Dan shook his hand.
When do dentists always ask questions? When it's impossible for us to answer.
Have you just had a tooth out? Yes, I have.
Who pulled it out for you?My dentist did.
What did he tell you to do afterwards?To rest for a while.
