| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could n't [vb infin] a | 501 |
|
| 2 | n't [vb infin] for a | 131 |
|
| 3 | could n't [vb infin] for | 108 |
|
| 4 | could [vb infin] for a | 102 |
|
