| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is it [prep] | 682 |
|
| 2 | is it [to-vb] | 94 |
|
| 3 | is [prep] [to-vb] | 37 |
|
| 4 | it [prep] [to-vb] | 22 |
|
