persuade sb. to do sth．意为“劝说某人做某事”。
I persuaded her to accept the invitation to Wu Dong's birthday party.我劝说她接受参加吴东生日晚会的邀请。
注意：如果劝说不一定成功，可用词组try to persuade sb, to do sth.。
I tried to persuade her to go with me, but I failed.我劝她跟我一起去，但我没成功。
另外，劝说某人不要做某事可用词组persuade sb. not to do sth. 或 persuade sb. against doing sth.
We persuaded Lin Tao not to smoke. = We persuaded Lin Tao against smoking.我们说服了林涛别吸烟。
4. But in the same year, cigarette smoking cost the government even more money, about 28 billion yuan.但在同一年里，因吸烟而使政府付出了更多的钱，约280亿元。
cost在这个句子中意为“使花费”，请注意由它构成的两个常用词组
a）（sth．）cost sb．+钱 （某物）花费某人多少钱
b）（sth，）cost sb．+其他 使某人失去……
No smoking, please!由www.yf1234.com收集及整理,转载请说明出处www.yf1234.com
www.yf1234.com That bike cost me 350 yuan.我花了350元买了那辆自行车。
His careless driving cost him a leg.他的粗心驾驶使他失去了一条腿。
以前学过的与“花费”有关的结构有：
a) sb. spend + 时间/钱+on + 名词 某人花……做……
b) sb. spend + 时间/钱+ (in) doing sth. 某人花……做……
c)sb. pay + 钱+ for sth. 某人花钱买……
d) It take sb. + 时间/钱 + to do sth. 某人花时间/钱做
他每月花50元钱买书可译为：
He spends 50 yuan on books every month.
He spends 50 yuan (in) buying books every month.
He pays 50 yuan for books every month.
It takes him 50 yuan to buy books every month.
小明每天花两小时学英语可译为：
Xiao Ming spends 2 hours on English every day.
Xiao Ming spends 2 hours (in) learning English every day.
It takes Xiao Ming 2 hours to learn English every day.
5.Do yon mind if I smoke ? 你介意我抽烟吗？
1）Do/Would you mind if ...? 常用来表示“请求、许可”的意思。句中的mind作“介意”、“反对”解。注意：如果用Would you mind if . . . ?从句中就要用虚拟语气。如：
Do you mind if I close the window? 关上窗户你介意吗？
Would you mind if I closed the window? 关上窗户你介意吗？
2）在回答这样的句子时要特别注意：若在答语里表示“愿意（不反对）”，应说“Certainly not”或“Of course not”。若表示“不愿意（反对）”，应说“I'm sorry, but...”，习惯上不用yes来直接回答。
3）在 Do／Would you mind之后还可跟动词-ing形式，在动词-ing之前还可以有人称代词宾格或物主代词，用来请求允许，或请求别人作某事。如：
Would you mind my turning off the TV?我关上电视你介意吗？
语法---句词性从句
一、名词性从句——宾语从句
宾语从句通常可分为三类：
1）由连词that引起的宾语从句
We know that it is not easy to give up smoking．我们知道戒烟不容易。
Suddenly he realized that he had made a mistake．突然他意识到他犯了一个错误。
I hope that you will be well．我希望你很快就会好起来。
说明：上述句子中的连词在口语和非正式场合均可省略。但是，下列句子中的连词在任何情况下都不可省略。
2）由连接代词或副词引起的宾语从句
Do you know when the meeting will be held? 你知道这次会议什么时候举行吗？
Please tell me what mother has bought for me today．请告诉我，妈妈今天给我买了些什么。
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No smoking, please!