| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | what [vb mod] i | 909 |
|
| 2 | what [modal v] i | 909 |
|
| 3 | what must [pron] | 52 |
|
| 4 | [pron] must i | 27 |
|
| 5 | what must i | 19 |
|
