| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | what [is] [v-ing] [adv prt] | 1188 |
|
| 2 | [verb] what [is] [v-ing] | 951 |
|
| 3 | [verb] [is] [v-ing] [adv prt] | 52 |
|
| 4 | [verb] what [is] [adv prt] | 43 |
|
