| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | what they [modal v] | 1018 |
|
| 2 | what they [vb mod] | 1018 |
|
| 3 | what [pron] could | 806 |
|
| 4 | what [pers pn] could | 788 |
|
| 5 | [pron] they could | 589 |
|
| 6 | what they could | 143 |
|
| 7 | what they could | 143 |
|
