| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] [pers pn] could account for | 6 |
|
| 2 | [pers pn] could [adv] account for | 7 |
|
| 3 | [pers pn] could [not/n't] account for | 6 |
|
| 4 | [pers pn] could not account for | 6 |
|
