第五课时　Section B(2a～2b)（10张ppt）.ppt
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　第五课时　Section B(2a～2b)
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1．serious
adj.“严肃的；庄重的”，比较级为more serious。
【拓展】seriously adv.严肃地
2．That's why I like reading books.这就是为什么我喜欢读书的原因。
why 在这里引导表语从句，故从句用陈述语序。
3．as long as
只要；既然，用来引导条件状语从句，相当于only if。
eg：I will buy the book as long as you like it.只要你喜欢我将买这本书。
4．necessary
adj.意为“必要的；必需的。”
【注意】necessary不能修饰人，只能修饰物，常用it作形式主语，而把真正的主语to do sth.放在句末。
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5．bring out使显现，使表现。
6．should
情态动词，意为“应该”。但它不可单独作谓语，须与实义动词原形连用，没有人称和数的变化。
eg：You should drink lots of water.你应该喝大量的水。
7．much less hard-working不努力得多
“less＋adj./adv.的原级”表示“……不如……”。
eg：He studies less carefully than his sister.他不如他的妹妹学习认真。
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一、根据句意及首字母提示补全下列单词。
1．She is a s________teacher.We are all afraid of her.
2．He often looks at himself in the m______after he gets dressed.
3．The teacher said to us，“K________，have a good time at the party！”
4．It's n________for us to learn English well in the 21st century.
5．—Well，Jimmy.You s________not eat too much ice-cream.
—I know it's not go