Sentence Composition
| 1 | 汤姆 | Tāngmǔ | Tom (name) |
| 2 | 在学 | zàixué | to be at school; to be studying |
| =3 | 校 | jiào | to check; to collate; to proofread |
| =3 | 校 | xiào |
|
| =4 | 吗 | má | (coll.) what? |
| =4 | 吗 | mǎ | used in 吗啡 mǎfēi |
| =4 | 吗 | ma | (question particle for "yes-no" questions) |