| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [be] often [verb] | 437 |
|
| 2 | it [be] [adv] use | 332 |
|
| 3 | it [be] [adv] use | 282 |
|
| 4 | [pron] [be] often use | 62 |
|
| 5 | it [be] often use | 22 |
|
