| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] [is] [vb pp] is [prep] | 8 |
|
| 2 | [Wh det] is [vb pp] be [prep] | 8 |
|
| 3 | what [is] [vb pp] be [prep] | 8 |
|
