The best; had better ...; it would be best
| 你最好去医院 |
| Nǐ zuì hǎo qù yīyuàn. |
| You'd better go to the hospital. |
Is it possible that...?; could it be that ...?; don't tell me ...
| 难道真的？ |
| nán dào zhēn de? |
| Is it possible that it's true? |
Because; due to; owing to; as a result of; thanks to
| 由于天气不好 |
| yóuyú tiānqì bù hǎo |
| Because of bad weather |
To guarantee; ensure
| 保证完成任务 |
| bǎo zhèng wán chéng rèn wù |
| guarantee to complete the task |