概要写作记叙文

概要写作---记叙文

判断叙述方式1圈划关键句分层文章内容

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三步走

一、叙述方式

一、事情发展顺序（总括）

起因（开端）

经过

结果（启示）二、时间发展顺序（总括）

时间1---事件1

时间2---事件2

时间N---事件N （总括）

【例1】

Tu Youyou has become the first Chinese woman to win a Nobel Prize, for her work in helping to create an anti-malaria medicine. The 84-year-old's route to the honor has been anything but traditional.

Tu Youyou started her malaria research after she was recruited to a top-secret government unit known as “mission 523”. In 1967, Communist leader Mao Zedong decided there was an urgent national need to find a cure for malaria. At the time, malaria spread by Vietnam. A secret research unit was formed to find a cure for the illness. Two years later, Tu Youyou was instructed to become the new head of Mission 523. She was dispatched to the southern Chinese island of Hainan to study how malaria threatened human health.

Ancient Chinese texts inspired Tu Youyou's search for her Nobel-prize winning medicine. Mission 523 pored over ancient books to find historical methods of fighting malaria. When she started her search for an anti-malarial drug, over 240 000 compounds around the world had already been tested, without any success. Finally, the team found a brief reference to one substance, sweet wormwood, which had been used to treat malaria in China around 400 AD.

The team isolated one active compound in wormwood, artemisinin, which appeared to battle malaria-friendly parasites.The team then tested extracts of the compound but nothing was effective in eradicating the drug until Tu Youyou returned to the original ancient text. After another careful reading, she tweaked the drug recipe one final time, heating the extract without allowing it to reach boiling point.

Tu Youyou first tested her medicine on herself to ensure it was safe. After the drug showed promising results in mice and monkeys, Tu Youyou volunteered to be the first human recipient of the new drug. “As the head of the research group, I had the responsibility,” she explained to the Chinese media. Shortly after, clinical trials began using Chinese labourers.

【例2】

For centuries people dreamed of going into space. This dream began to seem possible when high-flying rockets were built in the early 1900s.

In 1903 a Russian teacher named Konstantin Tsiolkovsky figured out how to use rockets for space travel. His plan was the first one in rocket science to use correct scientific calculation. About 30 years later, a U.S. scientist named Robert Goddard built the first rockets that could reach high altitudes. During World War II, German scientists built large rockets that could travel very far and carry dangerous explosives. After the war, scientists from Germany went to the United States and the Soviet Union to help those countries build space rockets.

These two countries were soon racing to get to space first. Each of these countries wanted to prove that it was stronger and more advanced than the other one. Both countries also had powerful bombs. People in the United States were worried when the Soviets were first to launch a space satellite, which was called Sputnik. The Soviets were also first to send a person into space. Yury Gagarin orbited the earth in the Vostok I spaceship in 1961.