| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is [adj] [verb] | 13649 |
|
| 2 | it [be] hard [verb] | 1369 |
|
| 3 | it be hard [verb] | 1369 |
|
| 4 | it [is] hard [verb] | 1073 |
|
| 5 | [pron] is hard [verb] | 716 |
|
