| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [conj] it [verb] [art] | 326 |
|
| 2 | [be] useful [conj] it [verb] | 17 |
|
| 3 | useful [conj] it [verb] [art] | 12 |
|
| 4 | [be] useful [conj] [verb] [art] | 11 |
|
