| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] necessary so that | 10 |
|
| 2 | [be] necessary so [that] | 10 |
|
| 3 | be necessary so [that] | 10 |
|
| 4 | is necessary so [that] | 6 |
|
| 5 | [is] necessary so [that] | 6 |
|
