| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [vb pp] [prep] | 70803 |
|
| 2 | us [vb pp] [prep] | 82 |
|
| 3 | us is [vb pp] | 18 |
|
| 4 | us is [prep] | 17 |
|
