| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] could [vb infin] | 45138 |
|
| 2 | [pers pn] could [vb infin] | 39978 |
|
| 3 | they [modal v] [vb infin] | 32619 |
|
| 4 | they could [vb infin] | 4286 |
|
| 5 | they could [verb] | 4234 |
|
