| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [noun prp] [modal v] [be] [vb pp] | 826 |
|
| 2 | at [noun] [modal v] [be] [vb pp] | 117 |
|
| 3 | at [noun prp] [modal v] [be] [verb] | 61 |
|
| 4 | at [noun prp] [modal v] [be] [vb pp] | 51 |
|
