| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is therefore necessary [verb] [art] | 10 |
|
| 2 | it is therefore necessary [verb] [art] | 10 |
|
| 3 | it is therefore necessary [verb] the | 8 |
|
| 4 | it is therefore necessary [verb] [adv] | 8 |
|
| 5 | it is therefore necessary [verb] the | 8 |
|
| 6 | it is therefore necessary [verb] [adj] | 7 |
|
| 7 | it is therefore necessary [verb] [adv prt] | 5 |
|
