| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [vb infin] [prep] | 9758 |
|
| 2 | i [vb infin] [prep] | 1992 |
|
| 3 | could i [vb infin] | 729 |
|
| 4 | could i [prep] | 8 |
|
