| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [is] [vb pp] [prep] | 72858 |
|
| 2 | [is] it [prep] | 1003 |
|
| 3 | it [vb pp] [prep] | 723 |
|
| 4 | [is] it [vb pp] | 543 |
|
