| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [not/n't] [vb infin] [verb] | 2608 |
|
| 2 | [not/n't] [vb infin] but [verb] | 252 |
|
| 3 | could [not/n't] [vb infin] but | 141 |
|
| 4 | could [not/n't] but [verb] | 27 |
|
| 5 | could [vb infin] but [verb] | 11 |
|
