| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun sg] [is] [adv] useful for | 34 |
|
| 2 | [is] [adv] useful for [verb] | 29 |
|
| 3 | [noun sg] [is] useful for [verb] | 22 |
|
| 4 | [noun sg] [is] [adv] for [verb] | 7 |
|
