| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [adj] for [v-ing] | 315 |
|
| 2 | [be] useful for [v-ing] | 99 |
|
| 3 | [be] useful [prep] [v-ing] | 87 |
|
| 4 | [be] useful [prep] [v-ing] | 87 |
|
| 5 | [be] useful for [verb] | 23 |
|
| 6 | [be] useful for [v-ing] | 23 |
|
