| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [v-ing] what [modal v] | 191 |
|
| 2 | [is] [v-ing] what | 157 |
|
| 3 | [is] what [modal v] | 138 |
|
| 4 | [is] [v-ing] [modal v] | 61 |
|
