| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [subord] it is [verb] | 3898 |
|
| 2 | it is usually [verb] | 151 |
|
| 3 | [subord] it is usually | 50 |
|
| 4 | [subord] is usually [verb] | 29 |
|
| 5 | [subord] it usually [verb] | 29 |
|
