| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [not/n't] [vb infin] [prep] [art] [num ord] | 9 |
|
| 2 | could n't [verb] [prep] [art] [num ord] | 8 |
|
| 3 | could [not/n't] [verb] [prep] the [num ord] | 6 |
|
