| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | to [be] [adj] to | 1675 |
|
| 2 | to [be] useful [prep] | 48 |
|
| 3 | [prep] [be] useful to | 14 |
|
| 4 | [prep] [be] useful to | 14 |
|
| 5 | to [be] useful to | 14 |
|
