| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] is necessary for [pron] [to-vb] | 26 |
|
| 2 | [pers pn] is necessary for [pron] [to-vb] | 25 |
|
| 3 | it is necessary for [pron] [to-vb] | 25 |
|
| 4 | it is necessary for [pron] [to-vb] | 25 |
|
| 5 | is [adv] necessary for [pron] [to-vb] | 9 |
|
| 6 | is [not/n't] necessary for [pron] [to-vb] | 5 |
|
| 7 | is not necessary for [pron] [to-vb] | 5 |
|
| 8 | is necessary for [pron] [to-vb] [adj] | 7 |
|
| 9 | is necessary for [pron] [to-vb] [adj] | 6 |
|
| 10 | is necessary for [pron] [to-vb] [prep] | 6 |
|
| 11 | is necessary for [pron] [to-vb] [prep] | 6 |
|
| 12 | is necessary for [pron] [to-vb] [pron] | 5 |
|
