| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] useful for [verb] | 99 |
|
| 2 | [be] useful [verb] [det] | 40 |
|
| 3 | [be] useful for [det] | 26 |
|
| 4 | [be] for [verb] [det] | 10 |
|
| 5 | useful for [verb] [det] | 5 |
|
