| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] used [subord] necessary | 11 |
|
| 2 | be used [conj] necessary | 11 |
|
| 3 | be used [conj] necessary | 7 |
|
| 4 | [be] used [conj] necessary | 7 |
|
| 5 | [be] used if necessary | 6 |
|
| 6 | [be] used if necessary | 6 |
|
