| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it be [adj] | 534 |
|
| 2 | it be [adj] | 403 |
|
| 3 | it be helpful | 161 |
|
| 4 | it [be] helpful | 161 |
|
| 5 | [pron] be helpful | 8 |
|
| 6 | it be helpful | 7 |
|
| 7 | it [be] helpful | 7 |
|
