| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [modal v] [verb] [been] [verb] | 520 |
|
| 2 | it [modal v] [verb] [verb] [det] | 160 |
|
| 3 | it [verb] [been] [verb] [det] | 96 |
|
| 4 | [modal v] [verb] [been] [verb] [det] | 88 |
|
| 5 | it [modal v] [verb] [been] [det] | 82 |
|
