jīn / tiān / shàng / kè / shí / wǒ / wàng / le / dài / xiàng / pí / cā / zhǐ / hǎo / xiàng / tóng / zhuō / jiè / le / yí / kuài

今天上课时，我忘了带橡皮擦，只好向同桌借了一块。

I forgot to bring an eraser to class today, so I had to borrow one from my desk mate.