| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is [verb] [prep] | 5452 |
|
| 2 | is often [verb] [prep] | 984 |
|
| 3 | it is often [verb] | 364 |
|
| 4 | it often [verb] [prep] | 56 |
|
| 5 | it is often [prep] | 27 |
|
