| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be what [vb past] [prep] [adj] | 13 |
|
| 2 | be [Wh det] happened [prep] [adj] | 10 |
|
| 3 | be [Wh det] [vb past] [prep] [det] | 8 |
|
| 4 | was [Wh det] [vb past] [prep] [adj] | 5 |
|
| 5 | is [Wh det] [vb past] [prep] [adj] | 5 |
|
