| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb base] [vb mod] [verb] | 988 |
|
| 2 | [vb base] [modal v] [verb] | 988 |
|
| 3 | [verb] could [verb] | 339 |
|
| 4 | [vb base] could [verb] | 73 |
|
