| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could not [vb infin] [prep] | 1000 |
|
| 2 | not [vb infin] [pn reflx] [prep] | 379 |
|
| 3 | could not [vb infin] [pn reflx] | 219 |
|
| 4 | could [vb infin] [pn reflx] [prep] | 177 |
|
