| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [is] [to-vb] [conj] [art] | 282 |
|
| 2 | [be] [to-vb] whether [art] | 46 |
|
| 3 | [is] [to-vb] [subord] [art] | 43 |
|
| 4 | [is] [verb] whether [art] | 38 |
|
| 5 | [is] [to-vb] whether [art] | 29 |
|
