說明文是就某一件事說明清楚，一般總是以空間順序展開的，可以自上而下，自左而右，從里到外，從整體到局部等等。寫物的文章常用“某處有某物”的句子表示物的存在。
常用的句型如：
There be...
I have got a/ an...
It is red/ green/ colour/ round...
I like... best.
It looks like...
I like it very much.
I will keep it forever.
題目：請以“Our Language Lab”為題，寫一篇不少于60個單詞的作文。
Our Language Lab
我們的語音室
There is a language lab in our school. It's on the third floor. It's big and clean.
我們學校有一個語音室，它位于三樓，大而整潔。
There are 50 desks and 50 chairs in it. There are 50 computers and a control desk in it. There are 50 headphones on the desk. 蘇州易優(yōu)語文培訓，閱讀寫作同步提升 http://www.zequeka.cn/mIniform.html
語音室里有50張桌椅，50臺電腦和一個操縱臺，桌子上還放著50副耳機。
Every week we have our English lessons here. We watch slides, TV, video and listen to tapes. Then the teacher asks us questions. We like our language lab and always keep it clean and tidy.
我們每周都會在這兒上英語課，我們在這里看幻燈片，電視，視頻和聽磁帶。然后老師會向我們提問。我們很喜歡這個語音室，并且總是保持它的干凈整潔。
點評：這篇文章寫了"我們的語音室",按照一定的空間順序，先寫設備，再寫功能，讓人對語音室的概貌有一個全面，準確的了解
