| 关于 | guān yú | pertaining to; concerning; with regard to; about; a matter of | |
| 有关 | yǒu guān | to have sth to do with; to relate to; related to; to concern; concerning | |
| 机关 | jī guān | mechanism; gear; machine-operated; office; agency; organ; organization; establishment; institution; body; stratagem; scheme; intrigue; plot; trick; Classifiers: 个 | |
| 关心 | guān xīn | to be concerned about; to care about | |
| 关键 | guān jiàn | crucial point; crux; Classifiers: 个 ; key; crucial; pivotal |
| 1 | Please close the door. | |
| 2 | The door is closed. | |
| 3 | Please close the door. | |
| 4 | Thank you for your care. | |
| 5 | Please close the window. |
