| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] they [vb mod] [vb infin] | 1406 |
|
| 2 | [Wh det] they [modal v] [vb infin] | 1406 |
|
| 3 | [Wh det] [pron] could [vb infin] | 1068 |
|
| 4 | [pron] they could [vb infin] | 350 |
|
| 5 | [Wh det] they could [verb] | 258 |
|
| 6 | [Wh det] they could [vb infin] | 238 |
|
