| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] could [not/n't] [verb] | 14316 |
|
| 2 | but [pron] could [not/n't] | 1374 |
|
| 3 | but [pron] could [verb] | 883 |
|
| 4 | but could [not/n't] [verb] | 316 |
|
| 5 | but [pron] [not/n't] [verb] | 16 |
|
