| 因为HSK 2 | yīn wèi | because; owing to; on account of | |
| 为了HSK 3 | wèi le | in order to; for the purpose of; so as to | |
| 为什么HSK 2 | wèi shén me | why?; for what reason? | |
| 为何 | wèi hé | why | |
| 为着HSK 3 | wèi zhe | in order to; because of; for the sake of |
| 认为HSK 3 | rèn wéi | to believe; to think; to consider; to feel | |
| 成为HSK 4 | chéng wéi | to become; to turn into | |
| 行为HSK 5 | xíng wéi | action; conduct; behavior; activity | |
| 作为HSK 5 | zuò wéi | one's conduct; deed; activity; accomplishment; achievement; to act as; as (in the capacity of); qua; to view as; to look upon (sth as); to take sth to be | |
| 以为HSK 4 | yǐ wéi | to think (i.e. to take it to be true that ...) (Usually there is an implication that the notion is mistaken – except when expressing one's own current opinion.) |
| 1 | Why aren't you coming? | |
| 2 | He apologized for being late. | |
| 3 | Why is he so busy? | |
| 4 | Why are you very angry? | |
| 5 | Why did you resign? |