| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [not/n't] [verb] [pers pn] | 3156 |
|
| 2 | [modal v] [not/n't] let [pers pn] | 814 |
|
| 3 | could [not/n't] let [pron] | 57 |
|
| 4 | could [adv] let [pers pn] | 54 |
|
