12-26 23:26:40 浏览次数:101次 栏目：高二英语教案
You need to take more exercise if you want to keep healthy .
She ate too much and did not take any exercise .
17. put on weight 增加体重；发胖。lose weight 减少体重。
Too many sweets and not enough exercise will make you put on weight .
To the great joy of her , she has lost much weight .
18. in the form of 以……的形式
He made the suggestion in the form of a question .
All sounds travel in the forms of waves .
Water exists in the form of ice , snow , steam , etc.
19. one person in ten = one-tenth = one person out of ten 十分之一的人
注意区别：ten to one 十有八九，有可能
20. by the age of 在……岁前；不超过……岁。by 在这里相当于 before 。
She had had three children by the age of 35 .
He had been in the army for two years by the age of 18 .
注意：at the age of 在……岁时。试对比：
She married at the age of 30 .
She had been married by the age of 30 .
21. put … in order 把……按照顺序排列好
22 . value for money 合算，花钱值得
23 . scores of 几十的，大量的，许多的（修饰可数名词）
24 . value of money 合算，花钱值得
25 . lose weight 减少体重
26 . die from heart illnesses 死于各类心脏疾病
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