我們一直在不斷的學習語法規則，為什么呢?因為語法知識是用英語交流的基礎。
1. Memorize 3 Fundamental Capitalization Rules
記住三個基礎的大寫規則
The first word in a sentence. You should always capitalize the first word in a sentence regardless of what type of word it is.
大寫句子里的首字母。不管句子里的第一個單詞屬于什么類別，都要大寫其首字母。
Proper nouns (names). These include the names of people, places, days and months, companies, etc. For example: Matthew, Helen, France, Tokyo, Mississippi, Saturday, January…
專有名詞首字母大寫。包括：人物的名字，地點，日期，月份，公司等。例如：馬修，海倫，法國，東京，密西西比州，星期六，一月等….
Honorifics and titles, as well as their abbreviations. Mr., Mrs., Miss, Doctor (Dr.), President, Lord, etc.
大寫敬語及頭銜的首字母。例如：先生，夫人，小姐，醫生，主席，公爵等。
2. I and Me Aren’t Interchangeable
I和Me是不可互換的
I and me are’t interchangeable. They are used in different grammatical constructions. I is a pronoun that serves as a subject of a sentence. For example, Matthew and I went for a walk, both I and Matthew are subjects of the sentence while went is the verb. Me is a pronoun that serves as an object of a sentence. Me is needed when someone else is performing the action.
I和 Me是不可互換的,它們用于不同的語法結構。I 是一個代詞，是一個句子里的主語。例如：馬修和我出去散步，這里I 和Matthew 都是句子里的主語，而went是一個謂語動詞。Me是一個代詞，作為句子里的賓語。當其他人需要執行某個動作時就需要使用me。
To use the example above: Matthew took me for a walk. Matthew is the subject and me is the object in the sentence. Knowing your subjects and objects will help you use these types of pronouns flawlessly!
使用上面的例子：馬修和我一起出去散步。Matthew是句子里的主語，me是句子里的賓語。明確你的主語和賓語會幫助你無誤地使用這些介詞。
3. Be Careful When Using Your and You’re
小心使用Your和You’re
This is probably the most common mistake on the internet today! Your and you’re sound absolutely the same, but they have very different meanings and uses.
這可能是今天網絡上最常見的錯誤!Your和You’re的讀音聽起來完全一樣，但是它們的意義和用法完全不同。
Your is a possessive determiner that attributes something to you:
Your是一個物主限定詞，用來限定屬于你的東西。
Your work is impressive!
你的工作簡直令人欽佩!
You’re is a contraction of you are:
You’re 是you are的縮寫。
You’re a very successful writer. (You are a very successful writer.)
你是一個非常成功的作家。(你是一個非常成功的作家。)
Mistakes happen when possessive pronouns are confused with verb contractions, even among native English speakers. Often, you may see phrases like your wrong (instead of you’re wrong), you’re sister (instead of your sister), etc. These are grammatical errors. They’re easy to avoid. Don’t repeat them!
物主代詞和動詞縮寫混淆的錯誤經常出現，即使是本族語使用者也常犯這樣的錯誤。通常情況下，你經常會看到your wrong(而不是you’re wrong)，you’re sister(而不是your sister)等。這些都是語法錯誤，很容易避免，所以不要重復犯錯!
4. Be Careful When Using Their, They’re and There
小心使用Their, They’re 和 There
這是代詞，縮寫以及副詞混淆的一個例子。Let’s analyze each of the words in question.下面讓我們在具體的例子中分析每一個詞。
Their is a possessive determiner. When using their, you indicate that something belongs to them. For example, Their car has broken down.
Their 是一個物主代詞。當使用their的時候，你的意思就是某物是屬于他們的。例如，他們的車壞了。
They’re is a contraction of they are. For example, If they’re not coming, I’m leaving early. (If they are not coming, I’m leaving early.)
They’re是 they are 的縮寫。例如，如果他們不來，我就早點離開。(如果他們不來，我就早點離開。)
There is an adverb indicating a location of something. For example, Your keys are over there, on the table.
There 是一個副詞，說明某物的地點。例如，你的鑰匙在那，在書桌上。
Once you understand the difference between these three words, you won’t make a mistake like their nice (instead of they’re nice) or there dog (instead of their dog) ever again!
一旦你理解了這三個詞之間的差別，你就不會犯類似的錯誤，例如，their nice(而不是they’re nice)或者there dog(而不是their dog)!
5. There’s a Subtle Difference Between Must and Have To
Must 與Have To有細微的差別
Modal verbs in English serve to indicate possibility, obligation and more. The most common examples of modal verbs include can, may, must, will and shall. Must is the one indicating an obligation or a necessity to do something.
英語中的情態動詞用來說明可能性，義務或者其他。最常見的情態動詞包括can, may, must, will和shall。Must是用來說明義務以及做某事的必要性。
I must wake up early to catch a morning train.
我必須早點起來去趕早車。
However, we could also say:
然而，我們也可以說：
I have to wake up early to catch a morning train.
我不得不早點起來去趕早車。
語法上來說，他們都對，但是有什么細微的區別嗎?有!
The difference between must and have to is subtle. Both refer to an obligation, but must indicates an opinion or suggestion. Have to is an expression of a more objective obligation coming from an outside force.
Must與have to之間的差別是細微的。兩者都指義務，但是must是指意見或者建議。Have to指來自于外部世界的客觀義務。
因此說某個人必須做她的家庭作業是你的意見。說她不得不做她的家庭作業代表著她必須這樣做。在非正式的場合must和have to不可互換。在正式一點的場合，熟知must和have to的區別你就可以把它們區分開。
