| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [vb infin] [prep] | 9758 |
|
| 2 | [vb mod] [vb infin] of | 2634 |
|
| 3 | [modal v] [vb infin] of | 2634 |
|
| 4 | could [verb] of | 532 |
|
| 5 | could [vb infin] of | 531 |
|
