less...than
表示“不像(如)……”。如：
It may be less useful than it appears at first. 它似乎不像初看上去那样有用。
Smell is less acute in man than in most animals. 人的嗅觉不如多数动物灵敏。
表示“比……少”“不如……多”。如：
He is said to pay less income tax than he should. 据说他所得税交得不够。
In insurance terms, an office-worker is less of a risk than a sportsman. 从保险业的角度看，办公室工作人员风险性小于运动员。
表示“与其……不如……”。如：
I regard him less as my teacher than as my friend. 与其说我把他当作老师，不如说我是把他当作朋友。
背单词的好方法
随时随地背单词
不知不觉背单词
当要特指两者中“较(更)……”时，比较级前通常要带定冠词，此时可视为比较级后省略了有关的名词或代词one，即定冠词实为修饰被省略的名词或代词one。如：
Which of the two methods is the better? 这两种方法哪一种更好?
Of the two possibilities, this is more likely than that. 两个可能性中，后者比前者更可能。
在比较级前用the表示程度(通常有表示原因、理由或条件的短语或从句)。如：
He’s had a holiday and looks the better for it. 他度假之后，气色好多了。
I love him all the more for his faults. 正因为他这些缺点，所以我越发爱他。

no less than
表示“多达”“有……之多”，用于强调数量之多。如：
No less than 1 000 people attend the meeting. 参加会议的多达1 000人。
He won no less than ￡5 000 in the lottery. 他居然中了5 000英镑的奖券。
表示“简直”“与……没差别”。如：
It is no less than robbery to ask for so much. 要求这么多，简直跟抢劫没两样。
Sports wears, no less than suits, are very much saleable. 运动服和西服套装一样，非常畅销。
表示“原来就是”“正是”。如：
He was no less than the mayor. 他原来就是市长。
Good heavens! It’s no less a person than the president! 天哪！原来真是总统啊！一点儿不假。

用于“the+比较级，the+比较级”，表示“越……越……”。如：
The younger you are, the easier it is to learn. 年纪越轻，学习越容易。
The better I know her, the more I admire her. 我对她越了解，我就越爱慕她。
The more money you make, the more you spend. 你挣的钱越多，花的钱也越多。
当by far用于修饰比较级且置于其前时，比较级前要用the。如：
He is by far the cleverer than her. 他比她聪明得多。
It’s quicker by far to go by train. 坐火车去要快得多。
注：与比较级连用，通常要放在比较级之后，若放在比较级前，则比较级通常应带有冠词。如：
He is cleverer by far than her.
It’s by far the quicker to go by train.

One of our rules is that every student ________ wear school uniform while at school.
A. might
B. could
C. shall
D. will

—Will you read me a story, Mummy?
—OK. You ________ have one if you go to bed as soon as possible.
A. might
B. must
C. could
D. shall

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