| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] could [adv] [adv] [verb] [verb] | 192 |
|
| 2 | [pers pn] could [adv] [adv] [verb] [verb] | 173 |
|
| 3 | they [modal v] [adv] [adv] [verb] [verb] | 89 |
|
| 4 | they could [adv] [adv] [verb] [verb] | 14 |
|
