| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] a mistake [verb] | 186 |
|
| 2 | [be] [adv] a mistake | 37 |
|
| 3 | [be] [adv] a [verb] | 22 |
|
| 4 | [adv] a mistake [verb] | 15 |
|
