tā / màn / man / yōu / yōu / de / zǒu / jìn / jiào / shì / dà / jiā / dōu / yǐ / jīng / kāi / shǐ / shàng / kè / le

他慢慢悠悠地走进教室，大家都已经开始上课了。

He sauntered into the classroom, but everyone had already started class.