| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | what [is] [adv] | 3510 |
|
| 2 | [v-ing] [is] [adv] | 704 |
|
| 3 | [v-ing] what [is] | 363 |
|
| 4 | [v-ing] what [adv] | 56 |
|
