| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [prep] [adv] a [noun] | 159 |
|
| 2 | [be] [prep] [adv] a [noun] | 159 |
|
| 3 | [be] at [adv] [art] [noun] | 131 |
|
| 4 | [be] at [adv] a [noun] | 97 |
|
