| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [is] [adv] a | 6342 |
|
| 2 | it [is] [adv] a | 4117 |
|
| 3 | [pron] [is] usually a | 175 |
|
| 4 | it [is] usually [art] | 101 |
|
| 5 | it [be] usually a | 61 |
|
| 6 | it [is] usually a | 51 |
|
