| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] could not | 1431 |
|
| 2 | [adv] could not | 1222 |
|
| 3 | thus [modal v] not | 36 |
|
| 4 | thus could not | 8 |
|
| 5 | thus could [adv] | 8 |
|
