| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [vb pp] at [num] [noun pl] [prep] | 11 |
|
| 2 | be [vb pp] at [num] levels [prep] | 6 |
|
| 3 | be [vb pp] at [num] level [prep] | 6 |
|
| 4 | be [vb pp] at [num] [noun sg] [prep] | 5 |
|
