| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [verb] as a [adj] | 269 |
|
| 2 | [modal v] [verb] [prep] a useful | 22 |
|
| 3 | [modal v] [verb] [prep] a useful | 22 |
|
| 4 | [modal v] [verb] as [art] useful | 17 |
|
| 5 | [modal v] [verb] as a useful | 17 |
|
| 6 | [modal v] [verb] as a useful | 17 |
|
| 7 | [modal v] [verb] as [art] useful | 17 |
|
