| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [modal v] [be] [adj] to | 67 |
|
| 2 | [verb] [modal v] [be] [adj] to | 67 |
|
| 3 | [verb] [modal v] [be] useful [prep] | 6 |
|
| 4 | [verb] [modal v] [be] useful [prep] | 6 |
|
| 5 | [verb] [modal v] [be] useful to | 5 |
|
| 6 | [verb] [modal v] [be] useful to | 5 |
|
