| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [be] [adv] [adj] know | 104 |
|
| 2 | it [be] [adv] [adj] whether | 63 |
|
| 3 | it [be] [adj] know whether | 30 |
|
| 4 | [be] [adv] [adj] know whether | 16 |
|
