| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] [pron] [modal v] [verb] | 10144 |
|
| 2 | [Wh det] [pron] [vb mod] [verb] | 10144 |
|
| 3 | [pron] [pron] could [verb] | 2392 |
|
| 4 | [Wh det] [pron] could [verb] | 1131 |
|
