| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is [vb pp] [prep] | 4737 |
|
| 2 | [subord] it is [vb pp] | 3265 |
|
| 3 | [subord] it is [prep] | 1450 |
|
| 4 | [subord] is [vb pp] [prep] | 385 |
|
| 5 | [subord] it [vb pp] [prep] | 10 |
|
