| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [adj] for us | 134 |
|
| 2 | is necessary for [pron] | 45 |
|
| 3 | is necessary for [pers pn] | 28 |
|
| 4 | be necessary for us | 15 |
|
| 5 | [be] necessary for us | 15 |
|
| 6 | [is] necessary for us | 11 |
|
| 7 | is necessary [prep] us | 10 |
|
| 8 | is necessary for we | 10 |
|
