| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] to [pron] [pron] could not | 5 |
|
| 2 | to [pron] [conj] [pron] could not | 9 |
|
| 3 | to [pron] [pron] could not [vb infin] | 10 |
|
| 4 | to [pron] [pron] could not [verb] | 10 |
|
