语法.note

1.  Singular nouns and the first time we refer to a person, animal or thing.
1. 单数名词以及我们第一次指代人、动物或事物。
a child    //一个孩子
an elephant    //一头大象
a television    //一台电视
 
2. We don't use A/AN with possessive pronouns, demonstratives or cardinal numbers.
2. 我们不将 A/AN 与所有格代词、指示词或基数词一起使用。
My shirt is dirty.     //我的衬衫脏了。
This car is expensive.     //这辆车很贵。
One person is in the reception.    //接待处有一个人。
 
3. We use ONE (or more) instead of A/AN when the number is important.
3. 当数字很重要时，我们使用 ONE（或多个）代替 A/AN。
There is only one exit from the airport.    //机场只有一个出口。

A is used when the next word begins with a consonant sound (b, c, d, f, g, h, j, k etc).
当下一个单词以辅音（b、c、d、f、g、h、j、k 等）开头时，使用 A。
a book    //一本书
a table    //一张桌子
a clock    //一个钟
a university (because the beginning of university sounds like YOU-niversity)    //一所大学（因为大学的开头听起来像YOU-大学）
 
AN is used when the next word begins with a vowel sound (a, e, i, o, u).
当下一个单词以元音（a、e、i、o、u）开头时，使用 AN。
an apple    //苹果
an elephant    //一头大象
an umbrella    //一把雨伞
an hour (because the H is silent)    //一个小时（因为 H 不发音）

1.  A singular or plural noun when it is clear/obvious which person or thing we are talking about.
1. 当我们正在谈论的人或事物很清楚/明显时，使用单数或复数名词。
There is a lamp in my bedroom. (we mention the lamp for the first time)    //我的卧室里有一盏灯。 （我们第一次提到灯）
The lamp is next to the desk.    //台灯在桌子旁边。
 
2. Anything which we identify immediately.
2. 我们立即识别出的任何内容。
We watched the new Brad Pitt movie last night.    //昨晚我们看了布拉德·皮特的新电影。
 
3. Musical instruments (the violin, the guitar, the drums, the flute, the piccolo).
3.乐器（小提琴、吉他、鼓、长笛、短笛）。
She plays the piano.    //她弹钢琴。
 
4. Something that is unique or there is only one.
4. 独一无二或只有一个的东西。
the sun    //太阳
the moon    //月亮
the internet.    //互联网。
 
5. Names of rivers, seas, oceans, mountain ranges and deserts (always in 	capitals).
5. 河流、海洋、大洋、山脉和沙漠的名称（总是大写字母）。
The Mississippi River    //密西西比河
The Black Sea    //黑海
The Andes    //安第斯山脉
The Sahara Desert    //撒哈拉沙漠
 
6. Directions (cardinal points).
6. 方向（基点）。
the west    //西方
the south-east    //东南部
the north-west.    //西北。

# 副词修饰动词
# 副词有时也能修饰名词
 
My dog eats slowly.     //我的狗吃得很慢。
Slowly is an adverb since it describes the way my dog eats.
慢慢地是一个副词，因为它描述了我的狗吃东西的方式。
 
# 副词修饰名词：
How does my dog eat? Slowly.    //我的狗怎么吃东西？慢慢地。

# 形容词修饰名词
 
He is very rich.    //他非常富有。
 
They are extremely happy.    //他们非常高兴。
 
She was totally crazy.    //她完全疯了。
 
My dog is well trained.    //我的狗训练有素。

fast, hard, early, late, high, low, right, wrong, straight and long

The Verb - To Do动词 - 要做
The verb TO DO  has four forms.动词 TO DO 有四种形式。
Present Tense: Do / Does
现在时：做/做
 
Past Tense: Did
过去时：做了
 
Past Participle: Done 
过去分词：完成
 
TO DO - Present Tense - (Do / Does)TO DO - 现在时 - (Do /Does)
The present tense of TO DO is:TO DO 的现在时是：
I / you / we / they - DO我/你/我们/他们 - DO
  he / she / it - DOES 他/她/它 - 是
 
I do my laundry on Saturdays.
我星期六洗衣服。
 
They do their chores when they arrive home.
他们到家后就做家务。
 
He does nothing all day.
他整天什么也不做。
 
She does charity work when she has time.
她一有时间就做慈善工作。
 
TO DO - Past Tense  - (Did)待办事项 - 过去时 - (Did)
The past tense of DO is DID for all subjects:所有科目的 DO 过去式都是 DID：
I / you / we / they / he / she / it - DID我/你/我们/他们/他/她/它-DID
 
I did my homework in record time.
我以创纪录的时间完成了作业。
 
We did everything we could to help.
我们竭尽全力提供帮助。
 
He did a somersault on the trampoline
他在蹦床上翻了跟头
 
TO DO - Past Participle   - (Done)TO DO - 过去分词 - （完成）
The past participle of DO is DONE. Remember that past participles are accompanied by TO HAVE or TO BE (in the correct tense):DO 的过去分词是 DONE。请记住，过去分词伴有 TO HAVE 或 TO BE（正确时态）：
 
I have done my homework.
我已经做完作业了。
 
He has done a good job.
他做得很好。
 
The video will show you how it is done.
该视频将向您展示它是如何完成的。
 
The report was done on time.
报告按时完成。
 
TO DO - To replace a verbTO DO - 替换动词
We sometimes use the verb DO to replace a verb when the meaning is clear or obvious. This replacement is more common in informal spoken English:当含义明确或明显时，我们有时会使用动词 DO 来代替动词。这种替换在非正式英语口语中更常见：
 
Do I need to do my hair? (do = brush or comb)
我需要做头发吗？ （do = 刷子或梳子）
 
Have you done the dishes yet? (done = washed)
你洗完碗了吗？ （完成=洗过）
 
I'll do the kitchen if you do the lawns (do = clean, do = mow)
如果你整理草坪，我就整理厨房（do = 清洁，do = 修剪）