| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [adj] whether | 563 |
|
| 2 | be [adj] whether | 561 |
|
| 3 | be certain [conj] | 388 |
|
| 4 | [be] certain whether | 11 |
|
| 5 | be certain whether | 11 |
|
