| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [adj] whether | 563 |
|
| 2 | be [adj] whether | 561 |
|
| 3 | be unknown [conj] | 68 |
|
| 4 | be unknown whether | 6 |
|
| 5 | [be] unknown whether | 6 |
|
