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My teacher
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contribution to human beings 为人类作出宝贵的贡献。

  Good health is priceless . 健康是无价之宝。

  value价,价值。估价,评价;珍重。valuable adj . 有价值的,贵重的。invaluable无价的(指无法衡量的高价值,相当于priceless)。如:

  This book is of more value than that one. 这本书比那本书价钱贵。

  You don't know the value of health. 你不知道健康的重要性。

  valueless无价值的,没有用的(=worthless)。如:

  a worthless, broken tool 没有用的工具。

  3, health, healthy, healthful

  health "健康;卫生",常用于be in good/poor health 身体很(不)健康。 healthy "健康的,健壮 的"(having health),当healthy 引伸为"有益于健康"的时候可与healthful换用。healthful "有益于健康的"( giving health)。如:

  Fresh air and exercise are good for the health . 新鲜空气和运动有益于健康。

  Swimming is a healthful exercise . 游泳是一项有益于健康的运动。

  Every person needs water and a diet of healthy/healthful food . 人人需要饮水和食用有益于健康的食品。

  4,reach与arrive:

  这两个词都有"到"的意思。reach表示到达什么地点时,是及物动词,后面直接跟表示地点的名词。例如:

  In October 1935 the Red Army reached northern ShanBei.一九三五年十月红军到达陕北。

  When does the train reach London?火车什么时候到达伦敦?

  arrive是不及物动词,表示到达什么地点时,后面应接介词in或at,例:

  He arrived in Beijing yesterday.他昨天到达北京。

  We arrived at the station in hot haste.我们急急忙忙赶到车站。

  【语法-系表结构】

  一、系表结构

  联系动词和名词、形容词、不定式、动词-ing 式,分词和副词连用,构成系表结构。

  That sounds a good idea.这听起来是个好主意。

  She turned red at the words.她听了这话脸红了。

  Speaking English may be difficult at first but it comes easy after plenty of practice.说英语开头有些难,多练习之后就容易了。

  He remained standing there for a couple of hours.他在那里站了两个钟头。

  The meeting wasn't over until midnight.会议开到半夜才结束。

  二、"变成"类系动词及搭配

  常见的"变成"类系动词有 become , get , come , go , grow , fall , turn , run 等,都表示从一种状态到另一种状态。尽管意思差不多,但搭配有差别。我们要注意以下几个方面。

  1 . 形容词作表语。

  go 和 come 是一对相反的词。"go + adj . "表示令人不快的事情,而"come + adj . "则表示好的事情。例如:

  In hot weather , meat goes bad .

  Things will come right in the end .

  go 与 come 前面的主语一般是物。例如:

  (误)She goes famous .

  (正)She becomes(gets)famous .

  表语为mad , crazy(古怪的),blind , lame 或表示颜色的词,go 前面的主语可以是人。例如:

  He went mad.

  Hearing this, she went red.

  run 后面接 short , dry , low , deep 等词,主语多为能流动,能消耗掉的东西。例如:

  Their money was running short.

  Still waters run deep.

  但 wild 作表语,主语可以是人。例如:

  Don't let the children run wild . 不要让孩子们毫无约束(变野了)。

  grow 与 run 相对,接表示人或物特征的静态形容词,也接表示天气的形容词,侧重于"逐渐变成"。例如:

  The girl grew thinner and thinner.

  Soon the sky grew light .

  turn 多接表示颜色的形容词,也接表示天气的形容词,它侧重变得与以前完全不同。

  The man turned blue with fear . 因害怕,这个人变得忧郁起来。

  The weather suddenly turned much colder .

  fall 接 asleep , silent 等静态形容词和表示疾病的形容词,但不能接形容词比较级。例如:

  She fell ill from cold .

  (误)She fell worse .

  (正)She got worse .

  fall short(没中),fall apart(散开),fall flat(没效果),可作成语记住。

  "get + adj . "是口语,用得广泛,get能替代become , become 较正式,get 与 become前面的主语既可以是人又可以是物。例如:

  He became(got)angry .

  His coat has become(got)badly torn .

  get较多地与形容词比较级连用。例如:

  The days are getting longer and longer .

  注意:become 一般不用于"将来成为"的意思。例如:

  (误)I hope you will become well .

  (正)I hope you will get well .

  2, become , turn , get , go , fall 能用名词作表语,其它的则不能。例如:

  His dream has become(got)a reality .

  He has turned scientist .

  He has gone socialist .

  He fell(a)victim to cancer . (他患了癌症。)

  注意:go , turn 后面的名词通常不带冠词。

  3, become , get , grow 能接过去分词,并且 come 和 go 多接有否定前缀的过去分词。

  "get + 过去分词"表示一次行为;"become + 过去分词"表示事情发生的最后结果。

  The string comes untied .

  His report went unnoticed .

  The fence gets white--washed every year .

  She became engaged as a typist .

  4, get , go , come 能接现在分词,不过它们已失去"成为"的意思。例如:

  They went in and got chatting together . (开始)

  We often go swimming. (去)

  He came running in. (来)

  5. come , grow , get 能接不定式,这种结构表示变化过程,come 表示"最终变得",get 表示"由不……变得",grow 表示"渐渐变得"。例如:

  I've really come to love this place.

  Mary's growing to be more and more like her mother.

  You'll soon get to like it.

  这种结构不能用于带有一段时间的完成时态。例如:

  (误)They have got to know each other for years .

  (正)They have known each other for years .

  6, 它们都可以接介词短语,固定搭配需要一个一个地记。例如:

  They went(grow)out of fashion . (它们变得不时髦了。)

  They ran out of money .

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