| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] what is [verb] | 1472 |
|
| 2 | [conj] what is [verb] | 322 |
|
| 3 | [conj] [prep] what [verb] | 312 |
|
| 4 | [conj] [prep] what is | 147 |
|
