| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] could [not/n't] [vb infin] | 14304 |
|
| 2 | [pers pn] could [not/n't] [vb infin] | 13769 |
|
| 3 | they [modal v] [not/n't] [vb infin] | 5937 |
|
| 4 | they could [adv] [vb infin] | 1854 |
|
| 5 | they could [not/n't] [vb infin] | 1283 |
|
| 6 | they could [not/n't] [verb] | 1267 |
|
