| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is [adv] [verb] | 5806 |
|
| 2 | it is often [verb] | 364 |
|
| 3 | is often [adv] [verb] | 128 |
|
| 4 | it is often [adv] | 103 |
|
