| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | what [vb past] [is] | 36 |
|
| 2 | [vb past] [is] that | 36 |
|
| 3 | what [is] that | 11 |
|
| 4 | what [vb past] that | 10 |
|
