| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb infin] [Wh adv] [pron] [verb] [pron] | 423 |
|
| 2 | [Wh adv] [pron] could [verb] [pron] | 165 |
|
| 3 | [vb infin] [pron] could [verb] [pron] | 135 |
|
| 4 | [vb infin] [Wh adv] [pron] could [verb] | 87 |
|
