| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] [vb mod] be useful | 353 |
|
| 2 | [pron] [vb mod] be for | 331 |
|
| 3 | [vb mod] be useful for | 89 |
|
| 4 | [pron] be useful for | 52 |
|
