我們在寫英語句子的時候，常常會犯一些相同的錯誤。下面這十個錯誤後面，都附有正確答案，以及詳細的解說。
Incomplete Sentence - Sentence Fragment
句子不完整——殘缺句
One common mistake many students make is the use of incomplete sentences. Each sentence in English must contain at least a subject and a verb, and should be an independent clause. Examples of incomplete sentences without a subject or a verb might include an instruction or a prepositional phrase.
許多學生都會犯一個常見的錯誤，就是寫出來的句子不完整。英語中，每個句子都必須至少有一個主語，一個動詞，並單獨成句。沒有主語或動詞的殘缺句子可能就只有表示指令的句子或者介詞短語了。
For example:
例如：
Through the door.
穿過大門。
In the other room.
在另一個房間。
Over there.
在那裡。
These are phrases we may use in spoken English, but that should not be used in written English as they are incomplete.
在英語口語中，你可能會用到這些短語，但是因為它們畢竟不是完整的英語句子，所以在書面語言中，我們一般不會使用。
Sentence fragments caused by dependent clauses used without an independent clause are more common. Remember that subordinating conjunctions introduce dependent clauses. In other words, if you use a subordinating clause beginning with a word such as 'because, though, if, etc.' there must be an independent clause to complete the thought. This mistake is often made on tests asking a question with 'Why'.
由於缺乏獨立分句的從屬子句導致的句子殘缺很常見。記住，從屬連詞引出了從屬子句。也就是說，如果你用一些詞語來引出從句，例如because，though，if等等，就必須要有一個獨立分句來使句子完整。我們在考試中，使用why來提出問題時，經常會犯這樣的錯誤。
For example, the sentences:
例如，下面這個句子：
Because Tom is the boss.
因為湯姆就是老闆。
Since he left work early without permission.
自從他不經允許就早退。
We might answer the question: "Why did he lose his job?" However, these are sentence fragments. The correct answer would be:
我們可能會問：「他為什麼丟掉工作?」但是，這些句子都是不完整的。正確用法應該是：
He lost his job because Tom is the boss.
因為湯姆就是老闆，所以他丟掉了工作。
He lost his job since he left work early without permission.
他因為不經允許就早退而丟掉了工作。
Other examples of incomplete sentences introduced by subordinating clauses include:
其他關於從屬子句的殘缺句還包括下面內容：
Even though he needs help.
雖然他需要幫助
If they study enough.
如果他們好好學習
As they had invested in the company.
因為他們投資了這家公司
Run-on Sentences
句子不連貫
Run-on sentences are sentences that:
不連貫句子指的是：
1) are not connected by appropriate linking language such as conjunctions
缺乏合適的連接詞，例如連詞。
2) use too many clauses rather than using periods and linking language such as conjunctive adverbs
使用過多的從句，而非句號和連接語，例如連接副詞
The first type leaves out a word - usually a conjunction - that is required to connect a dependent and independent clause. For example:
第一種是漏掉了一個詞——通常是連接詞——用於連接非獨立子句和獨立子句。
The students did well on the test they didn't study very much.
學生們考得很好他們沒有下多少功夫。
Anna needs a new car she spent the weekend visiting car dealerships.
安娜想買輛新車她整個周末都在約見代理商。
The first sentence should use either a conjunction 'but', or 'yet' or a subordinating conjunction 'although, even though, or though' to connect the sentence. In the second sentence, the conjunction 'so' or the subordinating conjunction 'since, as, or because' would connect the two clauses.
第一句話要麼應該加上一個連詞but，要麼加上yet，或者一個從屬連詞although, even though或though來連接前後兩句。
The students did well, yet they didn't study very much.
學生們考得很好，但他們並沒有下多少功夫。
Anna spent the weekend visiting car dealerships since she needs a new car.
因為想買輛新車，安娜整個周末都在約見代理商。
Another common run on sentence occurs when using too many clauses. This often occurs using the word 'and'.