五．数词
1. 掌握基数词和单数名词构成合成词的用法。例：
a five-year plan (正)
a five-years plan (误)
2. 掌握倍数的表示
1）倍数+ as+ 形容词或副词原级+ as
The city is twice as big as that one.,
2) 倍数+ 形容词或副词比较级+ than
A is four times larger than B. A比 B 大四倍。
A is twice smaller than B. A是B 的三分之一。
3）倍数＋名词结构
The size of the local primary school is twice that of the local kindergarten.
4) 动词+ by + 数字百分比或倍数
The production went up by three times over the previous year.
六．形容词
1．形容词作定语时的位置
1) 形容词作定语时通常放在被修饰名词前面。例：
There is a pretty girl sitting under the tree.
2) 形容词短语作定语时通常放在被修饰名词后面。例：
The test paper difficult for him was not very difficult for the other students.
3) 形容词一般放在以-ing, -body, -one等结尾的复合代词后面。例：
There is nothing exciting in the party.
4) 英语中多个形容词作前置定语时，顺序如下：1. 限定词(前－中－后)→2. 性质(描绘)形容词→3. 大小、长短、高低(矮)形容词→4. 形状形容词→5. 年龄、新旧形容词→6. 颜色形容词→7. 国籍、地区、出处形容词→8. 物质、材料形容词→9. 用途、类别形容词→10. 动名词、名词中心词。例:
a charming small round old brown Chinese wooden writing table
2. 只作表语，不能作定语的形容词
1）表示健康状况的形容词，如：well, ill
2) 由a＋词根构成的词，如：afraid, alert, alike, alive, alone, ashamed, asleep, awake, aware 等。
3． 由-ing /-ed 分词转化来的形容词特点
1) 作定语时，-ing分词转化来的形容词带有主动、进行含义；-ed 分词转化来的形容词带有被动、完成含义。如：developing country (发展中国家)，developed country (发达国家)
2）作表语时，-ing分词转化来的形容词表示某物本身具有的特点，–ed 分词转化来的形容词表示主语所处的状态。如：
The book is interesting.
We are interested in the book.
The film is moving.
we are all moved.
Hearing the news, we are excited.
4. 以-ly结尾的形容词
1） 大部分形容词加-ly可构成副词。但 friendly，deadly，lovely，lonely，likely，lively，ugly，brotherly，仍为形容词。
She sang lovely. （错）
He spoke to me very friendly. （错）
Her singing was lovely. （对）
He spoke to me in a very friendly way. （对）
2）有些以-ly 结尾既为形容词，也为副词，如daily，weekly，monthly，yearly，early等。例如：
The Times is a weekly paper. 《时代周刊》为周刊。
The Times is published weekly. 《时代周刊》每周发行一期。
