| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] could [pers pn] [adv] [vb infin] | 153 |
|
| 2 | [Wh adv] could [pers pn] [adv] [vb infin] | 121 |
|
| 3 | why [modal v] [pers pn] [adv] [vb infin] | 28 |
|
| 4 | why [vb mod] [pers pn] [adv] [vb infin] | 28 |
|
| 5 | why could [pers pn] [adv] [vb infin] | 14 |
|
| 6 | why could [pers pn] [adv] [vb infin] | 5 |
|
| 7 | why could [pron] [adv] [vb infin] | 5 |
|
| 8 | why could [pers pn] [adv] [vb infin] | 5 |
|
| 9 | why could [pers pn] [adv] [verb] | 5 |
|
