| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [not/n't] [pers pn] [verb] | 2100 |
|
| 2 | [vb mod] [not/n't] [pers pn] [verb] | 2100 |
|
| 3 | could [adv] [pers pn] [verb] | 350 |
|
| 4 | could [not/n't] [pron] [verb] | 346 |
|
| 5 | could [not/n't] [pers pn] [verb] | 335 |
|
