Topic sentence: Linguists have classified writing systems into three basic types.
Supporting details:
1. The first type, logographic systems, each sign stands for a word. The most prominent example of a logographic writing system is Chinese characters.
2. The second type of writing system is called the syllabary, each sign represents one syllable. Japanese hiragana, a well-known syllabary, is fairly easy to learn and use.
3. The last type of system, the alphabet, is also by far the most common. In alphabets, each sign stands for one segment. To put it another way, in an alphabet more or less each vowel and consonant sound has its own corresponding sign.
Concluding sentence:
All languages change over time, which can lead to differences between how words are spelled and how they are pronounced. As students of English know well, at times learning to spell English words may cause just as much frustration as learning Chinese characters. In sum, any writing system has its good and bad points, and people will always have conflicting opinions about which one is best suited for any given language. What’s more, languages with challenging writing systems take longer to learn, so it’s good to be aware of this factor if you plan to study a foreign language.