| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [subord] it [is] [adv] | 6295 |
|
| 2 | [subord] it [is] [adv] | 4252 |
|
| 3 | [conj] it [is] usually | 152 |
|
| 4 | [subord] [pron] [is] usually | 87 |
|
| 5 | [subord] it [be] usually | 69 |
|
| 6 | [subord] it [is] usually | 63 |
|
