| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] [be] [verb] to | 10340 |
|
| 2 | [modal v] [be] [verb] to | 10340 |
|
| 3 | could [be] [verb] [prep] | 7289 |
|
| 4 | could [be] [verb] [prep] | 7289 |
|
| 5 | could [be] [verb] to | 892 |
|
| 6 | could [be] [verb] to | 892 |
|
| 7 | could [be] [verb] to | 892 |
|
