| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] [modal v] to [be] | 316 |
|
| 2 | [v-ing] [Wh det] [modal v] [be] | 91 |
|
| 3 | [v-ing] [Wh det] [modal v] to | 7 |
|
