| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be useful for [adj] [noun] | 23 |
|
| 2 | [be] useful for [adj] [noun] | 18 |
|
| 3 | [be] useful for [adj] [noun pl] | 16 |
|
| 4 | [be] useful for [adj] [noun sg] | 7 |
|
