| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [verb] at [adv] [n mass] | 16 |
|
| 2 | be [vb pp] at [adv] [noun] | 11 |
|
| 3 | be [verb] at least [noun] | 11 |
|
| 4 | be [v-ing] at [adv] [noun] | 6 |
|
