1. 不定式的否定式的构成
通常是将否定词not或never置于不定式之前,即构成not to do 或never to do 的形式,注意not和never一定要放在不定式符号to的前面,而不是其后面:
The doctor advised me not to smoke. 医生劝我不要抽烟。
Its politically short-sighted not to do so. 不这样做在政治上是短视的。
He strongly advised me not to do so. 他使劲劝我别这样做。
Take care not to break it. 小心别把它打破了。
Be careful not to break anything. 当心别打破什么了。
She had sense enough not to say anything about it. 她有足够的头脑不提此事。
Father warned me never to drive after drinking. 父亲警告我不要酒后开车。
Visitors are requested not to touch the exhibits. 参观的人请勿触摸展品。
【注意】若不定式为完成式和被动式,否定词应置于整个结构之前:
She pretended not to have seen him. 她假装没看见他。
It is nice not to be dependent on others. 不依靠别人是好的。
You were silly not to have locked your car. 你没锁车太傻了。
2. so as to do sth 和in order to do sth 的否定式
对于这两个结构的否定式,通常是将否定词置于不定式符号to之前,而不是置于整个结构之前或其他位置:
Study hard so as not to fail the exam. 努力学习,以免考试不及格。
He came in quietly in order not to wake his wife. 他轻轻进来,以免把他妻子吵醒。
Go in quietly so as not to wake the baby. 进去时不要出声,以免把宝宝吵醒。
Take every precaution so as not to catch cold.采取一切预防措施以免感冒。
We keep the window shut in order not to let the flies in. 我们把窗子关着以免苍蝇进来。
They hid themselves in the cave in order not to be seen by the enemy. 他们躲在洞穴里以免被敌人发现。
Please reply at once in order not to lose this opportunity of a lower price. 请立即回复,以免失去这次低价的机会。
They must have worn gloves in order not to leave any fingerprints. 他们一定戴上了手套,以防留下指纹。
上一篇: 初中英语语法:完全倒装
下一篇: 初中英语语法:一般现在时表示将来
英文美文:一个女子的一生能有多精彩?
体坛英语资讯:Germanys Friedrich takes 4-man bobsleigh World Cup overall title
体坛英语资讯:FIFA concludes its six-month mission in CAF
体坛英语资讯:Roundup: Kipchoge, Kosgei lead Kenya hunt for Olympic marathon glory
泰国大选提前投票受阻 当局寻求收复被占领区域
国际英语资讯:Turkey, Germany, France, UK discuss Syrias Idlib, coronavirus via teleconference
国际英语资讯:Biden projected to win Floridas Democratic primary -- U.S. media
I Have Grown Up 我已经长大了
美国重量级团体支持希拉里竞选总统 已开始筹款
国际英语资讯:U.S. sanctions impair Irans ability to fight COVID-19: Iranian FM
国内英语资讯:China willing to do its utmost to help the Philippines: Chinese FM
奥巴马提名密码专家出任NSA新局长 亲自面试
不要迷信“超级食物”!这五种吃法无助于提高免疫力
国际英语资讯:Sub-Saharan Africa reports more COVID-19 cases amid stronger countermeasures
国际英语资讯:U.S. sanctions Syrian defense minister over Idlib conflict
国内英语资讯:Xi holds talks with Pakistani president to deepen ties amid fight against COVID-19
体坛英语资讯:Austrias Hoelzl takes double win in womens ski jumping World Cup
国内英语资讯:China to deepen the reform of government functions, enhance employment stability
巴黎的出租车大战
体坛英语资讯:Anadolu Efes beat Red Star 85-78 in basketball Euroleague
泰国示威者领导人丧生 大选或推迟半年
体坛英语资讯:MLS champions Seattle Sounders acquire Brazilian midfielder Joao Paulo
国内英语资讯:China always welcomes foreign journalists to report in China: spokesman
担忧疫情蔓延 美股“熔断”全球股市下跌
教你做甜美辛香的冬日姜饼
国内英语资讯:China Focus: Chinese firms aid Italys anti-virus fight with donations of medical supplies
国际英语资讯:Iraqi president urges new PM-designate to hold early elections
国内英语资讯:Xi Focus: Xis article on providing strong sci-tech support for winning war against COVID-1
国际英语资讯:Diary in Rome: From quarantine to lockdown amid coronavirus outbreak
体坛英语资讯:China book 7 womens, 5 mens singles quarterfinal berths at ITTF German Open