| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | useful for [verb] the | 41 |
|
| 2 | is useful for [verb] | 39 |
|
| 3 | is useful [verb] the | 31 |
|
| 4 | is useful for the | 12 |
|
| 5 | is for [verb] the | 8 |
|
