diet和food的区别： diet 指为健康或减肥而指定的特别食物；  food指所有能吃能喝的东西。
out of balance    不平衡keep one’s balance  保持平衡lose one’s balance        失去平衡
ought to (should) 应该，应当You ought to look after yourself when I’m away. This work ought to be done at once.
weight的所有形式否定形式ought not to (oughtn’t to)我不该抽那么多烟。I ought not to smoke so much.
一般疑问句形式将ought 直接提到句首。I ought to apologize to him.Ought I to apologize to him?
“Nothing could be better.” he thought. 用否定词+比较级形式表示最高级的意义
我没有看过比这部更好的电影。I have never seen a better film .
我想不出更好的主意了。2. I can’t think of a better idea.
没有人比他跑得更. Nobody can run faster than him.
（2010，全国卷2）Mr. Black is very happy because the clothes made in his
factory have never been ______.
A. st popularD.the most popular
比较级+than+any other+名词单数（最高级含义）
China is larger than any other country in Asia.  中国比亚洲任何其它国家都大。
2. Bill runs faster than any other boy in his class.  在班里Bill跑得比别的男孩都快。
be / get tired of(对……厌烦）
be tired from/with…因为…而劳累
    He was tired from/with walking so long.    走了那么长的路他累了。
Ex. Tony told me he was tired ___ cutting grass for the whole morning and that he wanted to have a good rest.
A.of  B. with
lose heart  失去信心lose face    丢脸lose interest  失去兴趣put on/gain weight  增加体重
watch one’s weight  控制体重No more for me. I have to watch my weight.
Curiosity drove Wang Peng inside.
curiosity (n.) 好奇心，好奇out of curiosity    出于好奇with curiosity        好奇地
satisfy one’s curiosity 满足某人的好奇心have curiosity about/to do sth.
对……好奇/有做某事的好奇心
curious（adj.)
be curious about…对……好奇
be curious to do…好奇地做某事
Ex. (2010,天津）People have always been ___ about exactly how life on earth began.
A.curious            B. excited  C. anxious            D. careful