| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [not/n't] [vb infin] [pron] [prep] | 550 |
|
| 2 | [modal v] [not/n't] [vb infin] [pn reflx] [prep] | 263 |
|
| 3 | could [adv] [vb infin] [pn reflx] [prep] | 128 |
|
| 4 | could [not/n't] [verb] [pn reflx] [prep] | 79 |
|
| 5 | could [not/n't] [vb infin] [pn reflx] [prep] | 79 |
|
