| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | what [is] [v-ing] [prep] [adj] | 98 |
|
| 2 | [pron] [is] [v-ing] on [adj] | 49 |
|
| 3 | what [be] [v-ing] on [adj] | 18 |
|
| 4 | what [is] [verb] on [adj] | 17 |
|
