| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [vb infin] see | 89 |
|
| 2 | could have see | 54 |
|
| 3 | could [verb] seen | 53 |
|
| 4 | could have see | 52 |
|
| 5 | could [verb] to see | 27 |
|
| 6 | could [verb] seeing | 8 |
|
