| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [vb pp] [to-vb] [prep] | 1545 |
|
| 2 | be [vb pp] [to-vb] at | 537 |
|
| 3 | [be] [vb pp] [to-vb] at | 537 |
|
| 4 | is [verb] [to-vb] at | 116 |
|
| 5 | is [vb pp] [verb] at | 107 |
|
| 6 | [is] [vb pp] [to-vb] at | 98 |
|
