| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [to-vb] at a | 20 |
|
| 2 | is [to-vb] at a | 8 |
|
| 3 | was [to-vb] at a | 5 |
|
| 4 | are [to-vb] at a | 5 |
|
