| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [to-vb] [is] [conj] | 461 |
|
| 2 | [verb] [is] whether | 155 |
|
| 3 | [to-vb] [is] [subord] | 61 |
|
| 4 | [to-vb] [be] whether | 40 |
|
| 5 | [to-vb] [is] whether | 36 |
|
