| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] could [adv] [adv] [verb] [to-vb] | 73 |
|
| 2 | they [modal v] [adv] [adv] [verb] [to-vb] | 35 |
|
| 3 | they could [adv] [adv] [verb] [verb] | 14 |
|
| 4 | they could [adv] [adv] [verb] [to-vb] | 5 |
|
