| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun sg] is useful for [verb] [noun pl] | 6 |
|
| 2 | [noun] is useful for [verb] [noun pl] | 6 |
|
| 3 | is [adv] useful for [verb] [noun pl] | 5 |
|
| 4 | is [adv] useful for [verb] [noun pl] | 5 |
|
| 5 | is useful for [verb] [adj] [noun pl] | 6 |
|
