| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] could [adv] | 9407 |
|
| 2 | [pers pn] could [adv] | 8090 |
|
| 3 | they [modal v] [adv] | 7065 |
|
| 4 | they could [adv] | 2471 |
|
| 5 | they could [adv] | 882 |
|
