| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is [prep] us | 33 |
|
| 2 | is [prep] us [to-vb] | 29 |
|
| 3 | it is [prep] [to-vb] | 28 |
|
| 4 | it [prep] us [to-vb] | 10 |
|
