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面对这位女同学突如其来的发问，白杨沉着冷静，不慌不忙，心平气和地说道："That's a great question. Thank you."
他是在表扬她："你提的问题非常棒，谢谢。"
女孩子有些沾沾自喜的样子，蹲屁股就坐下了。
此时，白杨看到她旁边的那位女老师脸色变红，当她发现白杨的目光对焦与她的时候，迅速低下了头。
她在默默地心想，"我看你下一步怎么办，到底说不说汉语。"
"Now,everyone,let's look at the blackboard."白杨边说，边拿起板擦快速擦掉左侧内容，并顺势画了一个简笔图：
画完简图又继续说道："Nominal subject clause means that a sentence has the function of a noun, which can be used as subject, predicate, object, etc. When it serves as a subject, it is called a subject clause, an object clause when it serves as an object, and a predicate clause when it serves as a predicate."
他边说着英文，打着手势，边在简图右侧注着汉字"主语从句、表语从句、宾语从句"，于是学生们很轻松的就理解了他表达的含义。
白杨为了验证学生的理解程度，他用手指向刚才提问的那位女同学说道："Hi,can you understand what I said?"
女孩子面带微笑，高兴地答道："老师，我能理解，您的意思是说名词性从句是指一个句子具有名词的作用，它在句中可作主语、表语、宾语等成分。当它作主语时，它叫主语从句，作宾语时叫宾语从句，作表语时叫表语从句。"
"You're absolutely right. You're great. However, we need to pay attention to whether the head of the body is too big when the subject clause is placed at the beginning of the sentence. Let's take what Dong Hao said at the beginning as an example."
白杨又及时对她说道："你回答的完全正确，你很棒。但是，我们需要注意一点，当主语从句放在句首时，是不是身体的头部显得太大了。我们拿刚才董㞻同学开始说的那句话为例吧。"
这时，白杨又在黑板上把原来的简笔画中的头放大了一倍，然后把董㞻说的一句"It's true that most young people like mountaineering no matter whether they are men or women."写在了黑板上。
"English sentences should be as beautiful as our human bodies, and the head should not be too big. That would make you top-heavy and wobbly.Therefore, we often use it as the subject of the sentence, and the real subject clause is put at the end of the sentence."
他用粉笔勾勒着句子的成分，一边说道："英语的句子应该和我们的人体一样保持美丽，头部不要太大。那样会头重脚轻，走路不稳。因此，我们常常用it作形式主语，真正的主语从句要放在句末。"
形象的比喻，滑稽的动作，真实的例句，流利的口语惊艳着所有人的眼神。
他们正像看好莱坞大片一样，期待着白杨继续讲下去，而白杨却突然踩住刹车，开始宣布课后作业了。
