| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [be] [adj] [that] [adj] [noun pl] | 538 |
|
| 2 | it [be] essential [that] [adj] [noun] | 62 |
|
| 3 | it [be] essential [conj] [adj] [noun pl] | 32 |
|
| 4 | [pron] [be] essential [that] [adj] [noun pl] | 32 |
|
