买书和钢笔英语怎么说

"Buy a book" 英文为 "buy a book"，意思是 "买一本书"。"Buy a pen" 英文为 "buy a pen"，意思是 "买一支钢笔"。
这些短语都是英语中很常见的，基本上都是来自英语本身。
下面是一些例句：
I need to buy a new book for my English class. 我需要买一本新的书学英语。
Can you please buy a pen for me? 你能帮我买一支钢笔吗？
I'm going to the bookstore to buy a book. 我要去书店买本书。
I forgot to bring a pen to class, can I borrow one from you? 我忘了带钢笔来上课，能借一支给我吗？