| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] [noun sg] [vb mod] be useful | 8 |
|
| 2 | [conj] [noun sg] [vb mod] be useful | 8 |
|
| 3 | [conj] [noun sg] [vb mod] [be] useful | 8 |
|
| 4 | [coord] [noun sg] [vb mod] [be] useful | 7 |
|
