1） The Sahara is the biggest desert in the world.
形容词最高级前通常必须用定冠词 the，副词最高级前可不用。
形容词most前面没有the，不表示最高级的含义，只表示“非常”。
It is a most important problem.
=It is a very important problem.
注意： 使用最高级要注意将主语包括在比较范围内。
（错）Tom is the tallest of his three brothers.
（对）Tom is the tallest of the three brothers.
2） 下列词可修饰最高级，by far， far， much， mostly， almost
This hat is nearly / almost the biggest.
注意：
a. very可修饰最高级，但位置与much不同。
This is the very best.
This is much the best.
b. 序数词通常只修饰最高级。
Africa is the second largest continent.
3） 句型转换：
Mike is the most intelligent in his class.
Mike is more intelligent than any other students in his class.
4） “否定词语+比较级”，“否定词语+ so… as”结构表示最高级含义。
Nothing is so easy as this.
=Nothing is easier than this.
=This is the easiest thing.
和more有关的词组
1） the more… the more…越……就越……
The harder you work，the greater progress you‘ll make.
2） more B than A与其说A不如说B
less A than B
He is more lazy than slow at his work.
= He is less slow than lazy at his work.
3） no more… than… 与……一样……，不比……多
The officials could see no more than the Emperor.
no less… than…与……一样……
He is no less diligent than you.
4） more than不只是，非常
She is more than kind to us all.
典型例题
1）The weather in China is different from____.
A. in America B. one in America C. America
D. that in America
答案：D. 本题意为“中国的天气比美国热。”比较的是天气而不是国家，C不能选。A没有名词，后句成分不全，排除。B和D中，B中的one常用来代替可数名词，而that可车以代替不可数或抽象名词，所以选D。
2）After the new technique was introduced，the factory produced ___ tractors in 1988 as the year before.
A. as twice manyB. as many twiceC. twice as manyD. twice many as
答案C. 此句意为“这个厂1988能生产的拖拉机是往年的两倍”。 表示倍数用“倍数+ as + 形容词原形+ as +比较对象”的句型。所以此句答案为C。
This ruler is three times as long as that one.