| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [adv] useful for [verb] | 63 |
|
| 2 | [noun sg] be [adv] useful for | 38 |
|
| 3 | [noun sg] be [adv] for [verb] | 23 |
|
| 4 | [noun sg] be useful for [verb] | 22 |
|
