| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] be [vb pp] at [art] | 209 |
|
| 2 | [is] be [vb pp] at [art] | 85 |
|
| 3 | [Wh det] [is] [vb pp] at [art] | 59 |
|
| 4 | [Wh det] [is] be [vb pp] at | 18 |
|
