比较have to和must
1) 两词都是'必须'的意思,have to 表示客观的需要, must 表示说话人主观上的看法,既主观上的必要。
My brother was very ill, so I had to call the doctor in the middle of the night. 我弟弟病得很厉害,我只得半夜里把医生请来。(客观上需要做这件事)
He said that they must work hard. 他说他们必须努力工作。(主观上要做这件事)
2) have to有人称、数、时态的变化,而must只有一种形式。但must 可用于间接引语中表示过去的必要或义务。
He had to look after his sister yesterday.
3) 在否定结构中: don't have to 表示"不必"
mustn't 表示"禁止",
You don't have to tell him about it. 你不一定要把此事告诉他。
You mustn't tell him about it. 你一定不要把这件事告诉他。
《夏洛特的网》第七章
New Year's art starts controversy
Iran steps up nuke activity as it rallies allies
Romney wins Iowa by 8 votes
Scalpers dial up trouble for iPhone release
Mayor vows action after killings of Chinese
Landslide kills 25 in Philippines
Teheran threatens blockade to counter US
Sudan troops, rebels clash in S. Kordofan
Bomb kills official at Iran nuke facility
Ministry defends progress on human rights
China supports AL framework for solving Syria crisis: FM
Measures to boost financial markets
Dragon gets global stamp of approval
US economy improving
China faces diplomatic challenges in 2012
Shenzhen cops accidentally shoot cabbie
暖心小说《小王子》第17章
《夏洛特的网》第五章(下)
Syria's Assad refuses to resign
Hello Kitty enters Silk Street
Kodak's latest Apple, HTC lawsuits may increase value of patent portfolio
Tokyo planning to name islets near Diaoyu Islands
《夏洛特的网》第三章(上)
Blasts used in hunt for 29 missing on Italian liner
US 'stoking up tensions' to gain regional role
Free library opens door to knowledge
First hybrid shark found off Australian coast
London set for a role in yuan transactions
Romney wins New Hampshire
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