| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [vb pp] [to-vb] | 11583 |
|
| 2 | is [vb pp] at | 2600 |
|
| 3 | [vb pp] [to-vb] at | 1030 |
|
| 4 | is [to-vb] at | 200 |
|
