| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | what is [vb pp] [prep] | 1306 |
|
| 2 | [vb -s] is [vb pp] [prep] | 99 |
|
| 3 | [vb -s] what is [vb pp] | 75 |
|
| 4 | [vb -s] what is [prep] | 25 |
|
