| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb infin] [prep] [be] | 13662 |
|
| 2 | could [vb infin] [prep] | 9758 |
|
| 3 | could [vb infin] [be] | 3102 |
|
| 4 | could [prep] [be] | 66 |
|
