| read | ➜ | reading |
| drink | ➜ | drinking |
| listen | ➜ | listening |
| teach | ➜ | teaching |
| write | ➜ | writing |
| swim | ➜ | swimming |
| read | ➜ | reading |
| drink | ➜ | drinking |
| listen | ➜ | listening |
| teach | ➜ | teaching |
| write | ➜ | writing |
| swim | ➜ | swimming |
quá dễ
drink => drinking
listen => listening
teach => teaching
write => writing
swim => swimming