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适合初中生的英语语法练习册Grammar On The Go 5册PDF源文件，这套练习册还有语法教学功能，边教边练
第一册 Speech简介：
The words in our language can be divided into eight main categories, depending on the job they do in a sentence. Some words have multiple functions and can be used in more than one way.
第二册 Puntuation简介：
Punctuation marks are like symbols used in our  language. It’s important to use punctuation carefully as these symbols help to  clarify the meaning of what we write.
第三册 Sentences简介：
Sentences enable us to  communicate complete thoughts in both speaking and writing. Learning to write strong sentences can make our writing more powerful.
第四册 Paragraphs简介：
A paragraph has a topic sen-tence, supporting sentences, and a closing sentence. Each sentence in the paragraph should focus on one main idea. Paragraphs generally have five sentences.
第五册 Spelling简介：
Which witch is which? Making sure our words are spelled correctly can help avoid confusion in our writ-ing so we know that the messages we send are clear and correct.
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