| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is it [adj] | 2201 |
|
| 2 | is it [adj] | 1626 |
|
| 3 | be it necessary | 86 |
|
| 4 | [be] it necessary | 86 |
|
| 5 | is [pron] necessary | 72 |
|
| 6 | is it necessary | 70 |
|
| 7 | [is] it necessary | 70 |
|
