| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | they could [verb] | 4343 |
|
| 2 | they could [vb infin] | 4286 |
|
| 3 | [pron] could hold | 100 |
|
| 4 | they [modal v] hold | 62 |
|
| 5 | they could hold | 16 |
|
