Lesson 43 Over the South Pole 飞越南极 主语从句 can Be able to

In 1929, three years after his flight over the North Pole, the American explorer, R.E. Byrd, successfully flew over the South Pole for the first time.

（time 表示“次，回”，还可以说 this time，last time，next time，another time， each time，for the last time 等）

• I remind you for the last time that if you don’t hurry, you’ll miss the train.
• Give him these photos next time you see him.

* Though, at first, Byrd and his men were able to take a great many photographs of the mountains that lay below, they soon ran into serious trouble.

though ^{conj.虽然…，尽管…  (引导让步状语从句)}

• Although/Though/Even though I felt sorry for him ,I was secretly pleased that he was having difficulties.^{虽然我为他感到惋惜，但对他的困难我却暗自高兴。}

run into trouble = get into trouble ^{遇到麻烦，陷入困境}

• Each time he ran into trouble, he asked his parents for help.

* At one point, it seemed certain that their plane would crash.

at one point ^{在某一地方，在某一时刻（point 也指时间上的某一点）}

• At one point, he made up his mind to become a painter.^{他曾一度下决心要当个画家。}

主语从句 ^{it 做为形式主语只是用于占位置，真正的主语是由 that 引出的主语从句。}

含义：一个句子做主语。

位置：句首、句尾(加分、防止头重脚轻)。

写法：同宾语从句^{that 不做成分也不能省略，只用whether不使用if来表达是否。}

It could only get over the mountains if it rose to 10,000 feet.  ^{could get over 能够越过(克服)}

The plane was then able to rise and it cleared the mountains by 400 feet.

by ^{表示“相差，以…之差”的意思}

• I missed the train by ten minutes. ^{我晚了 10 分钟，没赶上火车。}
• He is younger than me by two years. ^{他比我小两岁。}
• She is sitting by the table. ^表示位置
• He sent the message by email. ^{表示手段或方式}
• I will finish my work by 5pm. ^表示时间
• She is a teacher by profession. ^{表示身份或职业}
• I swear by my honor. ^{表示借助、依靠}
• The soup is sold by the liter. ^{表示数量或比例}

Byrd now knew that he would be able to reach the South Pole which was 300 miles away, for there were no more mountains in sight.^{通过3个连接句讲了4件事。}