| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [been] in london | 14 |
|
| 2 | [vb past] [been] in london | 14 |
|
| 3 | [vb past] been in london | 14 |
|
| 4 | had [been] in london | 12 |
|
