| 知道HSK 2 | zhī dào | to know; to become aware of; also pr. [zhi1 dao5] | |
| 道德HSK 5 | dào dé | virtue; morality; ethics; Classifiers: 种 | |
| 道路 | dào lù | road; path; way; Classifiers: 条 | |
| 报道HSK 5 | bào dào | to report (news); report; Classifiers: 篇 | |
| 街道HSK 3 | jiē dào | street; Classifiers: 条 ; subdistrict; residential district |
| 1 | I really don't know. | |
| 2 | He apologized for being late. | |
| 3 | I don't know how to answer. | |
| 4 | This math question is very difficult. | |
| 5 | I also don't know the answer. |