| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [adj] [that] [adj] [noun pl] | 241 |
|
| 2 | is essential [that] [adj] [noun pl] | 31 |
|
| 3 | is essential [that] [adj] [noun] | 19 |
|
| 4 | is essential [conj] [adj] [noun pl] | 12 |
|
| 5 | [be] essential [that] [adj] [noun pl] | 10 |
|
| 6 | be essential [that] [adj] [noun pl] | 10 |
|
| 7 | [is] essential [that] [adj] [noun pl] | 10 |
|
