| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] produce a | 432 |
|
| 2 | [Wh det] produce a | 129 |
|
| 3 | [Wh det] [modal v] produce | 93 |
|
| 4 | [Wh det] [modal v] a | 62 |
|
