luda 49.nowadays，both teachers and parents worry a great deal about the student ' s using the internet .
今天，教师和家长都非常担心学生上网现象。
经典句型解析之both…and…句型
“both…and…”起连接词作用，作“两者都、和……都、既……又”、“又……又”、“不但……而且”解：
注意：“both…and…”能连接各种并列成分，甚至两个句子。
1. Both mother and baby are doing well. (连接两个主语)
母子平安。
Both copper and silver are good conductors of electricity.铜和银都是良好的电导体。
Both he and she are students.
他和她都是学生。
Both the movie and the play were good.
电影和剧本都很好。
Both his mother and his father will be there.
他父母二人都要去那里。
在连接两个主语时，否定句表示部分否定：
He can't play both the violin and the piano.
他会拉小提琴或者会弹钢琴。（不全会）
Both Li Ming and Li Li are not good students.
李明和李莉不都是好学生。（其中一个是好学生）
全部否定可用 neither ... nor句型，这里不再展开，可查阅我前期文章有论述。
2.The molecules of common salt all contain atoms of both the gas and the metal which compose the salt.(连接of的两个宾语)
食盐分子都具有构成食盐的气体和金属这两种物质的原子。
There will be a test of both oral and written French.
将有一次法语口试和笔试。
She was a wonderful mother to both her natural and adopted children.
她对亲生的和领养的孩子一样好。
Abuse can lead to both psychological and emotional problems.
虐待可造成心理和情绪上的问题。
The law applies to both individuals and corporate bodies.
本法律既适用于个人也适用于法人团体。
For this job you will need a good knowledge of both Italian and Spanish.
担任这项工作需要精通意大利语和西班牙语。
Consideration must be given to both the development of production and the improvement of the people's livelihood.
发展生产和改善人民生活二者必须兼顾。
Any such action would have to be approved by both American and Saudi leaders.
任何这样的行动都必须获得美国和沙特领导人双方的批准。
He is miserly with both his time and his money.
他对时间和金钱都很吝啬。
3. The actors were both engaging and skillful in their performances.
他的演员在表演中既有魅力又有技巧。(连接两个表语)
The results of the research are both impressive and alarming.
研究结果既令人印象深刻又令人担忧。
Alloys are both useful and important.合金既有用又重要。
The benefits of conservation are both financial and aesthetic.
保护自然环境在经济上和美化环境上都有好处。
It has the double advantage of being both easy and cheap.
它具有既方便又便宜的双重优点。
4.To do work, you must both exert force and move something.(连接两个动词短语)为了作功，你必须既施加力又推动某个东西。
5. The plot moved both swiftly and artfully throughout the movie. (连接两个状语)
整个电影的情节既迅速又巧妙。
The plane flied both fast and aggressively when the pilot realized there was an enemy hunting it.
当飞行员意识到有敌人在追捕他时，飞机飞得又快又猛。
Copper is an important conductor, both because of its high conductivity and because of its abundance and low cost.铜是一种重要的导体，因为它的导电率高，而且资源丰富，价格又低。
Now women work both before and after having their children.
现在妇女在生孩子前后都要去工作。
The play is being cast in both the US and Britain.
目前正在英美两国挑选这部戏的演员。
The product is sold both at home and overseas.
这个产品行销国内外。
6.He both speaks and writes English.她不但会说英语，而且会写英语。（连接两个谓语）
In the program tonight Mary will both sing and dance.
在今天晚上的节目里，玛丽又要唱歌又要跳舞。
We both applauded and stood up.
我们都鼓掌起立。
Ebert both likes and recommends the movie.
埃伯特既喜欢又推荐这部电影。
7. There are teas both with and without caffeine.（连接两个定语）
有带和不带咖啡因的两种茶。
8.It is necessary to build a lot of petrochemical works, both because China is rich in petroleum and because there is a great demand for petrochemicals.(连接两个状语从句)
由于中国石油丰富，而对石油化学产品需要量又大，所以有必要建立许多石油化工厂。
both + 不定式或动名词 + and + 不定式或动名词，例如：
不定式：
The directors wanted both to win and to receive recognition for their work.
董事们既希望获胜，也希望他们的工作得到认可。
There is a drive both to standardise components and to reduce the number of models on offer
正在为实现零部件标准化和减少推出的型号数量而努力。
Or we can allow students both to choose their majors and pay for their education themselves.
要么我们就让学生自己选择专业，但同时也要自己支付教育费用。
六级真题- 2018年 6月
说明第二个不定式to是可以省略的。
动名词：
The producers ended up both extending and expanding their filming hours.
制片人最终既延长了拍摄时间，又延长了拍摄时间。