A simple sentence usually has a single piece of information.
简单句通常指包括单一信息。
When you practice writing, transform simple sentences into more complex sentences by adding more information to the sentence.
在你的写作练习中，你可以通过在简单句上增加一些信息来把它变成更复杂的句子。
For example, ask yourself some wh- questions to see what else you can add to the original sentence.
比如，问自己一些“wh-问题”，包括 what、when、why、who 等等，琢磨一下你还能在最初的简单句上增加些什么。
For instance, "These days everyone has a mobile phone."
比方说，简单句是“现如今人手一部手机。”
Think to yourself: who, what, why?
思考一下：是谁？发生了什么？原因是什么？
"These days people of all generations have mobile phones, especially smartphones because you can do so many things with them."
复杂句就是：“现在不论年龄大小，几乎每个人都有手机，尤其是智能手机，因为用手机可以做的事情太多了。”
In your writing there should be a balance of simple and complex sentences.
在你的作文中，简单句和复杂句的数量应该相对平衡。
In addition, punctuation can change meaning.
此外，标点不同，句子的意思也可能不同。
For instance, we got in through the window which someone had left open.
比如，我们是从那扇开着的窗户进来的（别的窗户可能是关着的）。
We got in through the window, which someone had left open.
我们从窗子里进来，是有人忘了关。（说明是从窗子进来，而不是门。）
Students aren't expected to be 100 percent accurate in their writing.
写作考试并不要求考生的作文100%准确。
However, control is important. Some grammatical errors impact communication more than others.
但是错误也要控制在范围内，因为有的语法错误会更影响交流。
You will be scored according to the impact of errors on communication rather than on the number of mistakes.
考官不是根据你的错误数量，而是根据你的错误对交流的影响来评分的。
Leave time at the ended writing to identify and correct errors.
留出时间来检查和修改作文中的错误。
You will always find grammar or spelling mistakes.
语法和拼写错误经常出现。
Correcting these can improve your score.
改掉这些错误能够有效提高得分。