| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [not/n't] [verb] [pron] that | 9 |
|
| 2 | could [not/n't] [vb infin] [pron] that | 9 |
|
| 3 | could [not/n't] [verb] [pers pn] that | 8 |
|
| 4 | could n't [verb] [pron] that | 7 |
|
