| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [to-vb] be [adv] [vb pp] at | 9 |
|
| 2 | [to-vb] be [adv] [verb] at | 7 |
|
| 3 | [to-vb] been [adv] [verb] at | 5 |
|
| 4 | to have be [adv] [verb] at | 5 |
|
