| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | what is [prep] | 685 |
|
| 2 | [to-vb] what is | 664 |
|
| 3 | [to-vb] is [prep] | 165 |
|
| 4 | [to-vb] what [prep] | 47 |
|
