| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [conj] [vb mod] be useful to | 7 |
|
| 2 | [noun sg] [conj] [vb mod] be useful to | 5 |
|
| 3 | [conj] [vb mod] be useful to [pers pn] | 5 |
|
| 4 | [conj] [vb mod] be useful to [pron] | 5 |
|
