| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | who [vb base] [been] [prep] | 142 |
|
| 2 | [pron] [vb base] [been] at | 97 |
|
| 3 | who [verb] [been] at | 72 |
|
| 4 | who [vb base] [be] at | 6 |
|
