| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [be] for [det] [noun] | 235 |
|
| 2 | [be] essential for [det] [noun] | 26 |
|
| 3 | it [be] essential for [noun] | 21 |
|
| 4 | it [be] essential for [det] | 7 |
|
