| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [is] often [verb] | 386 |
|
| 2 | it [is] often [vb pp] | 383 |
|
| 3 | it [is] [adv] forgotten | 35 |
|
| 4 | it [is] [adv] forgotten | 30 |
|
| 5 | [pron] [is] often forgotten | 17 |
|
| 6 | it [be] often forgotten | 13 |
|
| 7 | it [is] often forgotten | 13 |
|
| 8 | it [is] often forget | 13 |
|
