a textbook on sth
on 后面接教材所讲的主题或学科。
She wrote a textbook on economic history.
她写了一本关于经济史的教科书。
教科书,特定学科的正式教材,尤其是用于学校或大学的；为学校或大学准备的书籍
a book used for teaching a subject, especially in schools or colleges
教科书,特定学科的正式教材,尤其是用于学校或大学的
A coursebook, a formal manual of instruction in a specific subject, especially one for use in schools or colleges.
为学校或大学准备的书籍
a book prepared for use in schools or colleges
I left my history textbook in the classroom, so I could not do the homework.
我把历史教科书忘在教室里了，所以没法做作业。
用法提示：textbook 是名词，指学校课程使用的正式教材。
AI contextual example
The teacher asked us to read the first three chapters of the biology textbook before Friday.
老师让我们在周五之前阅读生物教科书的前三章。
用法提示：textbook 作名词，表示某一学科的教学用书。
AI contextual example
She carried a heavy stack of textbooks to the library every morning.
她每天早上都抱着一大摞教科书去图书馆。
用法提示：textbooks 是 textbook 的复数形式，仍为名词，指多本教材。
AI contextual example
on 后面接教材所讲的主题或学科。
She wrote a textbook on economic history.
她写了一本关于经济史的教科书。
for 后面接教材的使用对象或适用课程。
This grammar is designed as a textbook for advanced learners.
这本语法书是为高级学习者编写的教材。
学科名词可直接放在 textbook 前面作定语，说明是哪一科的教材。
He left his chemistry textbook in the lab.
他把化学课本落在实验室了。
grammar · medium
易错句子I forgot to bring textbook to class today.
正确表达I forgot to bring a textbook to class today.
textbook 是可数名词，单数形式前必须有限定词。汉语说“带课本”可以不带量词，但英语单数可数名词不能裸用，需加不定冠词 a（或 the、my 等）。
grammar · medium
易错句子There are many textbook in the library.
正确表达There are many textbooks in the library.
many 只能修饰可数名词复数，所以 textbook 要用复数形式 textbooks。这与前面漏冠词的错误不同：此处错在名词的数，而不是限定词。
grammar · medium
易错句子I read an interesting story on my textbook.
正确表达I read an interesting story in my textbook.
表示“书里的内容”时英语用介词 in，因为内容包含在书中；汉语“在课本上”用方位词“上”，容易迁移成 on。此处指课本里的文字内容，不是放在书封面上的东西，所以应用 in。
学校教科书
The school textbooks are kept in the library.
学校的教科书存放在图书馆里。
历史教科书
She opened her history textbook to chapter five.
她翻开历史教科书到第五章。
数字教科书；电子教材
Many students now prefer digital textbooks to printed ones.
现在许多学生更喜欢数字教科书而不是纸质书。
课程教材
Please bring the course textbook to every class.
请每节课都带上课程教材。
教科书出版商
The company is a leading textbook publisher in Asia.
该公司是亚洲领先的教科书出版商。
发短 /ʊ/ 音 (如 good, book)
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语言教材
This language textbook includes many listening exercises.
这本语言教材包含许多听力练习。