| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is [adj] [verb] | 13649 |
|
| 2 | it [be] helpful [verb] | 97 |
|
| 3 | it be helpful [verb] | 97 |
|
| 4 | it [is] helpful [verb] | 95 |
|
| 5 | [pron] is helpful [verb] | 91 |
|
