| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [prep] a [noun] [conj] | 746 |
|
| 2 | be [prep] a [noun] [conj] | 746 |
|
| 3 | be at [art] [noun] [conj] | 240 |
|
| 4 | be at a [noun] [conj] | 73 |
|
| 5 | [be] at a [noun] [conj] | 73 |
|
