| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] is [vb pp] [prep] | 3498 |
|
| 2 | what is [vb pp] [prep] | 1306 |
|
| 3 | [conj] what is [vb pp] | 254 |
|
| 4 | [conj] what is [prep] | 53 |
|
