| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] [vb past] [been] [vb pp] | 2035 |
|
| 2 | [vb past] [been] [vb pp] since | 124 |
|
| 3 | [Wh det] [vb past] [vb pp] since | 18 |
|
