| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is [adj] [prep] us | 108 |
|
| 2 | it is [adj] for us | 90 |
|
| 3 | it is important [prep] us | 20 |
|
| 4 | it is difficult [prep] us | 16 |
|
| 5 | it is [adj] to us | 12 |
|
| 6 | it is necessary [prep] us | 10 |
|
| 7 | it is hard [prep] us | 9 |
|
| 8 | it is impossible [prep] us | 8 |
|
