| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] [vb past] what | 3138 |
|
| 2 | [pron] [vb past] [modal v] | 948 |
|
| 3 | [vb past] what [modal v] | 181 |
|
| 4 | [pron] what [modal v] | 93 |
|
