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His long boring story made me yawn.
他的冗长的故事听得我直打呵欠
as if 与as though用法概述
as if 与as though是一组同义词，意思相同，用法也相同，但多数情况下人们喜欢用as if，因为其简短。
1. 通常情况下，as if/as though所引导从句的谓语动词为虚拟语气，表示所述情况与事实相反。
Why is she looking at me as though she knew me?
她为什么那样看着我，好像认识我似的？
2. 如果as if后面的从句表示的情况是真实的或者很可能是真实的，则动词可以用陈述语气。
He walks as if he is drunk.
He walks as if he were drunk.
第一句表示“他已经醉了”，第二句则表示“他没有醉”。
3. 在非正式文体中，可以用like代替as if/as though
It looks like it's going to rain today.
4. 当asif/as though引导的从句主语和主句的主语一致时，该主语和后面的动词可以省略，于是出现了以下几种情况。
1) as if+不定式
He opened his lips as if (he were)to make some reply.
2) 不定式+adj.
She felt unable to endure such a life.
她觉得似乎无法再忍受这种生活了。
3) as if+介词短语
He looked about as if (he was)
in search of something.
4) as if+现在分词
John paused as if expecting Mary to speak.
5) as if+n.
He acts as if (he was) a fool.
puncture n./v. 刺穿
Our tires do not puncture easily.
我们的轮胎不易爆破。
I've got a puncture and my spare is flat too!
我的车胎扎破了，备用的也瘪了！
scratch v. 抓，挠，刮擦
The dog is scratching at the door.
狗正在抓门。
run v. 运营，经营
He has no idea of how to run a business.
他不知如何经商。
