| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [be] [prep] | 23930 |
|
| 2 | [is] it [be] | 1290 |
|
| 3 | [is] it [prep] | 1003 |
|
| 4 | [is] [be] [prep] | 84 |
|
