| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is therefore [adj] that | 113 |
|
| 2 | is therefore [adj] that | 113 |
|
| 3 | is [adv] essential that | 54 |
|
| 4 | is [adv] essential that | 50 |
|
| 5 | is therefore essential [conj] | 16 |
|
| 6 | [be] therefore essential that | 14 |
|
| 7 | is therefore essential that | 14 |
|
| 8 | [is] therefore essential that | 14 |
|
| 9 | is therefore essential that | 14 |
|
| 10 | be therefore essential that | 14 |
|
