| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | who have [adv] [vb pp] at | 23 |
|
| 2 | [Wh pn] had [adv] [vb pp] at | 11 |
|
| 3 | [Wh pn] has [adv] [vb pp] at | 7 |
|
| 4 | [Wh pn] have already [vb pp] at | 5 |
|
