| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could n't [vb infin] for a | 15 |
|
| 2 | could n't [vb infin] a [adj -er] | 14 |
|
| 3 | n't [vb infin] for a [adj -er] | 7 |
|
| 4 | could [vb infin] for a [adj -er] | 5 |
|
