| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [verb] [prep] | 9783 |
|
| 2 | could [verb] [prep] | 9783 |
|
| 3 | [modal v] [verb] of | 2681 |
|
| 4 | could [verb] of | 532 |
|
