| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb infin] [to-vb] [be] [conj] | 38 |
|
| 2 | [verb] [to-vb] [be] whether | 20 |
|
| 3 | [vb infin] [verb] [be] whether | 5 |
|
