| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it be [adj] for | 3918 |
|
| 2 | [pron] be essential for | 142 |
|
| 3 | it be essential [prep] | 137 |
|
| 4 | [pers pn] be essential for | 100 |
|
| 5 | it be essential for | 90 |
|
| 6 | it [be] essential for | 90 |
|
