| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [adv] necessary [to-vb] [adv prt] | 26 |
|
| 2 | is [adv] necessary [verb] [adv prt] | 20 |
|
| 3 | is [adv] necessary [verb] out | 12 |
|
| 4 | is [not/n't] necessary [verb] [adv prt] | 6 |
|
| 5 | is not necessary [verb] [adv prt] | 6 |
|
| 6 | is therefore necessary [verb] [adv prt] | 5 |
|
| 7 | is not necessary [verb] [adv prt] | 5 |
|
| 8 | is therefore necessary [verb] [adv prt] | 5 |
|
