| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun prp] could [not/n't] [vb infin] | 1381 |
|
| 2 | but could [not/n't] [vb infin] | 316 |
|
| 3 | but [noun prp] could [vb infin] | 75 |
|
| 4 | but [noun prp] could [not/n't] | 72 |
|
