| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [adv] necessary for [pers pn] [to-vb] | 9 |
|
| 2 | is [adv] necessary for me [to-vb] | 6 |
|
| 3 | is [adv] necessary for i [to-vb] | 6 |
|
| 4 | is [not/n't] necessary for [pron] [to-vb] | 5 |
|
| 5 | is not necessary for [pron] [to-vb] | 5 |
|
