| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | useful for [verb] [noun pl] | 42 |
|
| 2 | is useful for [verb] | 39 |
|
| 3 | is useful [verb] [noun pl] | 9 |
|
| 4 | is for [verb] [noun pl] | 6 |
|
| 5 | is useful for [noun pl] | 6 |
|
