| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [coord] so could not be | 7 |
|
| 2 | [conj] so could not be | 7 |
|
| 3 | and so could not be | 7 |
|
| 4 | and so could not be | 7 |
|
| 5 | so [pron] could not be | 6 |
|
| 6 | so [pers pn] could not be | 6 |
|
| 7 | so could not be [vb pp] | 7 |
|
| 8 | so could not be [verb] | 7 |
|
