| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | whether it [is] possible [to-vb] | 21 |
|
| 2 | whether it [is] possible [to-vb] | 21 |
|
| 3 | whether it [is] possible [to-vb] | 21 |
|
| 4 | whether it is possible [to-vb] | 19 |
|
