| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] but could | 61 |
|
| 2 | [vb pp] but could | 22 |
|
| 3 | [vb past] but could | 19 |
|
| 4 | [to-vb] but could | 10 |
|
| 5 | [v-ing] but could | 5 |
|
