| 认为 | rèn wéi | to believe; to think; to consider; to feel | |
| 认识 | rèn shi | to know; to recognize; to be familiar with; to get acquainted with sb; knowledge; understanding; awareness; cognition | |
| 认真 | rèn zhēn | conscientious; earnest; serious; to take seriously; to take to heart | |
| 承认 | chéng rèn | to admit; to concede; to recognize; recognition (diplomatic, artistic etc); to acknowledge | |
| 认定 | rèn dìng | to maintain (that sth is true); to determine (a fact); determination (of an amount); of the firm opinion; to believe firmly; to set one's mind on; to identify with |
| 1 | I knew him before. | |
| 2 | How many people do I know? | |
| 3 | Do you know Lao Wang? | |
| 4 | We must admit the fact. | |
| 5 | He is diligently learning to read. |
