| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [not/n't] [verb] [pers pn] [prep] [art] | 536 |
|
| 2 | could [adv] [verb] [pers pn] [prep] [art] | 186 |
|
| 3 | could [not/n't] [verb] [pron] [prep] [art] | 157 |
|
