一、教法建议
【抛砖引玉】
本单元围绕海洋知识这一题材，让同学们通过阅读“The Sea”“Salt Lakes of the World”和“Life in the Oceans”来了解有关海洋及海洋生物的知识。
单元双基学习目标
Ⅰ. 词汇学习
四会单词和词组：sailor , do well , make up one’s mind , bathe , time ( vt .) , spring , beg , beg one’s pardon , captain , depth , merely , huge , construction
   三会单词和词组：seaside , beach , dive , navy , drown , come up , vast , surface , solid , various , variety , float , the Dead Sea , partly , on average , pole , the South Pole , huge , at a time , occur , treasure , voyage , load , cycle , kg = kilogram(me) , the Atlantic = the Atlantic Ocean
Ⅱ. 交际英语
道歉和遗憾
一般来说，中国人喜欢反复强调自己的谦意，并喜欢用“非常抱歉”、“深表歉意”等表示程度倾向的语句，而英美人士则不同，对于因客观原因而造成的过失或差错，则不必主动工过分向对方表示歉意。如一定要向对方道歉，说声 sorry 即可，一般不用 very , terribly , truly 等表示程度的词。因为在美国，过分的道歉或自责反而显得不太诚恳，令人感到虚假或另有用心。
   Some useful expressions：
    1 . Sorry / Pardon / I‘m sorry .
    2 . I’m sorry for/about…
    3 . I‘m sorry to do sth . / I’m sorry to have done sth…
    4 . Excuse me  ( for… )
    5 . be afraid that…
    6 . What a pity/shame !
    7 . It‘s a pity that…
    8. That’s all right . /It doesn‘t matter . /That’s nothing .
9 . That‘s OK . /It’s quite all right . /Never mind . /No trouble at all . / That‘s not your fault .
交际示范：
    ( A is late for a birthday party )  .
    A : Come in , Mr Smith . Nice to see you .
    B : Nice to see you too . I’m very sorry to be late .  ( I‘m sorry to have kept you waiting .  )
    A : It doesn’t matter . We‘re glad you could come .
    B : I didn’t quite remember the number of your house , so it took me a long time to find your house .
    A : I‘m sorry that I didn’t make myself clear .
    B : Oh , that‘s nothing .
   Ⅲ. 语法重点
学习省略句的用法。
【指点迷津】
单元重点词汇点拨
1. sailor水手；海员
He will make a good sailor . 他将成为很好的水手。
〖点拨〗go to sea当船员。当sailor与形容词连用时表达“……于乘船的人”。如：a bad / poor sailor会晕船的人。
另外，sailer是“帆船”。go sailing去航海。
2. time vt . 测定……的时间；记录……的时间
I timed him the 5000 metre race at the sports meet .
〖点拨〗含 time 的高频介词短语
    1） at a time  每次，一次
    A whale may eat a ton of small fish at a time , and may enjoy four meals a day .
    2） at the same time  同时
    The two little boys reached the finish line at the same time .
    The head of the whale contains a lot of oil , and this is probably cooled at the same time .
    3） at one time  以前，曾经
    At one time , there were long queues of people waiting outside the CAAC offices .
    At one time I lived in Japan .
    4） from time to time  间或，时常，不时地
    I’ll see you from time to time .
    She sent her pocket money to him from time to time for a year .
    5） in time 及时
    We were just in time to catch the bus .
    Fortunately , I was in time for the interview .
    6） on time  准时，按时；于指定时间
    The train pulled in on time .
    He seldom gets to work on time .
    7） at all times  无论何时；一直
    We should at all times be aware of our own shortcomings .
    8） at no time  在任何时候都不，决不
    At no time will China be the first to use unclear weapons .
    9） at times  有时
    I do feel a little nervous at times .
   10） in no time  立刻，很快
    I‘ll be back in no time .
    I am sure that I can learn typing in no time .
3. drown溺死；淹死
An eight-year-old girl was drowned in the river .
〖点拨〗a drowning boy溺水的男孩。
4. various各种各样的；不同的
Of all the various methods of learning a foreign language , I think this is the best .
Various kinds of bicycles can be bought in this shop .
〖点拨〗variety是名词“多样化（不可数）；种类（可数）”。a variety of各种各样的。如：Varieties of TV programmes are being broadcast on TV at present .
5. depth深度；深；厚度
Snow fell to a depth of over nine inches .
〖点拨〗in depth从深度上讲。What’s the depth of … ？……多深 ？

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