| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is therefore [adj] | 763 |
|
| 2 | is [adv] vital | 119 |
|
| 3 | be therefore vital | 18 |
|
| 4 | [be] therefore vital | 18 |
|
| 5 | [is] therefore vital | 14 |
|
