| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] [be] [adj] for [v-ing] | 449 |
|
| 2 | [pron] [be] useful [prep] [v-ing] | 26 |
|
| 3 | [pron] [be] useful [prep] [v-ing] | 26 |
|
| 4 | [pron] [be] useful for [v-ing] | 16 |
|
| 5 | [pron] [be] useful for [verb] | 16 |
|
