语法一：the+最高级+比较范围
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.
语法二：兼有两种形式的副词
1) close与closely
close意思是近; closely 意思是仔细地
He is sitting close to me.
Watch him closely.
2) late 与lately
late意思是晚; lately 意思是最近
You have come too late.
What have you been doing lately?
3) deep与deeply
deep意思是深，表示空间深度;deeply时常表示感情上的深度，深深地
He pushed the stick deep into the mud.
Even father was deeply moved by the film.
4) high与highly
high表示空间高度;highly表示程度，相当于much
The plane was flying high.
I think highly of your opinion.
5) wide与widely
wide表示空间宽度;widely意思是广泛地，在许多地方
He opened the door wide.
English is widely used in the world.
6) free与freely
free的意思是免费;freely 的意思是无限制地
You can eat free in my restaurant whenever you like.
You may speak freely; say what you like.
语法三：助动词
1)协助主要动词构成谓语动词词组的词叫助动词(Auxiliary Verb)。被协助的'动词称作主要动词(Main Verb)。
助动词自身没有词义，不可单独使用，例如：
He doesn't like English. 他不喜欢英语。
(doesn't是助动词，无词义;like是主要动词，有词义)
2) 助动词协助主要动词完成以下功用，可以用来：
a. 表示时态，例如：
He is singing. 他在唱歌。
He has got married. 他已结婚。
b. 表示语态，例如：
He was sent to England. 他被派往英国。
c. 构成疑问句，例如：
Do you like college life? 你喜欢大学生活吗?
Did you study English before you came here? 你来这儿之前学过英语吗?
d. 与否定副词not合用，构成否定句，例如：
I don't like him. 我不喜欢他。
e. 加强语气，例如：
Do come to the party tomorrow evening. 明天晚上一定来参加晚会。
He did know that. 他的确知道那件事。
3) 最常用的助动词有：be, have, do, shall, will, should, would