| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [adj] [conj] it [verb] [art] | 162 |
|
| 2 | be useful [conj] [pron] [verb] [art] | 16 |
|
| 3 | [be] useful [conj] it [verb] [art] | 7 |
|
