語法一：the+最高階+比較範圍
1) The Sahara is the biggest desert in the world.
形容詞最高階前通常必須用定冠詞 the，副詞最高階前可不用。
形容詞most前面沒有the，不表示最高階的含義，只表示非常。
It is a most important problem.
=It is a very important problem.
注意： 使用最高階要注意將主語包括在比較範圍內。
(錯) Tom is the tallest of his three brothers.
(對) Tom is the tallest of the three brothers.
2) 下列詞可修飾最高階，by far, far, much, mostly, almost
This hat is nearly / almost the biggest.
注意：
a. very可修飾最高階，但位置與much不同。
This is the very best.
This is much the best.
b. 序數詞通常只修飾最高階。
Africa is the second largest continent.
3) 句型轉換：
Mike is the most intelligent in his class.
Mike is more intelligent than any other students in his class.
4) 否定詞語+比較級，否定詞語+ so… as結構表示最高階含義。
Nothing is so easy as this.
=Nothing is easier than this.
=This is the easiest thing.
語法二：兼有兩種形式的副詞
1) close與closely
close意思是近; closely 意思是仔細地
He is sitting close to me.
Watch him closely.
2) late 與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與deeply
deep意思是深，表示空間深度;deeply時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與highly
high表示空間高度;highly表示程度，相當於much
The plane was flying high.
I think highly of your opinion.
5) wide與widely
wide表示空間寬度;widely意思是廣泛地，在許多地方
He opened the door wide.
English is widely used in the world.
6) free與freely
free的意思是免費;freely 的意思是無限制地
You can eat free in my restaurant whenever you like.
You may speak freely; say what you like.
語法三：助動詞
1)協助主要動詞構成謂語動詞片語的詞叫助動詞(Auxiliary Verb)。被協助的'動詞稱作主要動詞(Main Verb)。
助動詞自身沒有詞義，不可單獨使用，例如：
He doesn't like English. 他不喜歡英語。
(doesn't是助動詞，無詞義;like是主要動詞，有詞義)
2) 助動詞協助主要動詞完成以下功用，可以用來：
a. 表示時態，例如：
He is singing. 他在唱歌。
He has got married. 他已結婚。
b. 表示語態，例如：
He was sent to England. 他被派往英國。
c. 構成疑問句，例如：
Do you like college life? 你喜歡大學生活嗎?
Did you study English before you came here? 你來這兒之前學過英語嗎?
d. 與否定副詞not合用，構成否定句，例如：
I don't like him. 我不喜歡他。
e. 加強語氣，例如：
Do come to the party tomorrow evening. 明天晚上一定來參加晚會。
He did know that. 他的確知道那件事。
3) 最常用的助動詞有：be, have, do, shall, will, should, would