| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it be [adv] [adj] for | 1812 |
|
| 2 | it be [adv] essential for | 30 |
|
| 3 | it be [adv] essential [prep] | 26 |
|
| 4 | [pron] be [adv] essential for | 24 |
|
| 5 | [pers pn] be [adv] essential for | 21 |
|
| 6 | it be [adv] essential for | 20 |
|
| 7 | it [be] [adv] essential for | 20 |
|
