| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [verb] at a [noun sg] | 1154 |
|
| 2 | [be] [to-vb] [prep] a [noun sg] | 304 |
|
| 3 | [be] [to-vb] at [art] [noun sg] | 102 |
|
| 4 | [be] [to-vb] at a [noun] | 16 |
|
