| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] because [pers pn] could not [vb infin] | 12 |
|
| 2 | [vb past] because [pers pn] could [not/n't] [vb infin] | 12 |
|
| 3 | [vb past] because [pers pn] could n't [vb infin] | 8 |
|
| 4 | [vb past] because he could [adv] [vb infin] | 6 |
|
