| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [vb pp] [verb] what [is] | 27 |
|
| 2 | [be] [verb] what [is] [prep] | 9 |
|
| 3 | [vb pp] [verb] what [is] [prep] | 5 |
|
