| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | what is [prep] | 685 |
|
| 2 | [vb infin] what is | 424 |
|
| 3 | [vb infin] is [prep] | 102 |
|
| 4 | [vb infin] what [prep] | 62 |
|
