| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [vb pp] [to-vb] at an | 12 |
|
| 2 | [be] [vb pp] [to-vb] at an | 12 |
|
| 3 | [vb pp] [to-vb] [noun] at an | 5 |
|
| 4 | [vb pp] [to-vb] at an [adj] | 9 |
|
| 5 | [vb pp] [to-vb] at an [adj] | 9 |
|
