| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | who [vb -s] be at | 19 |
|
| 2 | [Wh pn] [vb -s] been at | 19 |
|
| 3 | [Wh pn] [vb -s] be at | 19 |
|
| 4 | [Wh pn] has be at | 17 |
|
