| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [to-vb] [adv] what [is] [verb] [prep] | 8 |
|
| 2 | [to-vb] [adv] what is [verb] [prep] | 7 |
|
| 3 | [to-vb] exactly what [is] [verb] [prep] | 6 |
|
| 4 | [to-vb] [adv] what [is] [vb pp] [prep] | 6 |
|
