词性是语言非常重要的概念，句子都是词构成的，词放句子的哪个位置，就涉及到词性了
冠词
名词前一般都有冠词：a、an、the
This is a monk.
The monk is Jack.
或物主代词
This is my book.
an/a 的区别
an + 元音发音开头的单词，其余用a
an egg
an orange
an hour // h不发音
冠词是戴在名词头上的帽子，没有特殊情况不能摘帽子
特殊情况：国家、国籍、人名、地名
I am chinese. // 不能说 I am a chinese.
He is in England.
有时候又不一样
This is a French car.
the发音
the student // 后面的词以辅音开头，读ðə
the Italian car // 后面的词以元音开头，读ði
介词 prep.
介词：媒婆，连接两个词或词与句子 媒婆：on/near/in/of/across
使用介词时，不能忘记动词！
The book is on the desk.
go across the stree.
动词 v.
分类：系动词、情态动词、实义动词、助动词
She is beautiful.
You must do it.
I wash my hands.
She is running.
及物动词vt. VS 不及物动词vi.
I wash my hands.
We do our homework.
I am looking at the picture.
He is listening to the radio.
They are waiting for the train.
副词 adv.
- 副词的功能：用来修饰adj.\v.\adv.
I am tired.
I am very tried.
I am awfully tried.
I love you.
I love you very much.
I love you awfully.
-
副词的位置：通常情况，行前动后
-
副词词性：努力地adv. vs 努力的adj.
hard work: 艰苦的工作 work hard：努力地工作
一词多性
n. + v.
color
air
milk
book
water
dust
park n.->公园、v.->停车
adj. + v.
clean
怎么用这些词
谁 – 干了什么 – 如何干的 – 在哪干的 – 何时干的
I – find a stranger – sunddenly – in the classroom.
He – left – hurriedly – last week.