| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [v-ing] what [pron] is [that] | 5 |
|
| 2 | [v-ing] what it [is] [that] | 5 |
|
| 3 | [v-ing] what [pers pn] [is] [that] | 5 |
|
| 4 | [v-ing] what it [is] [that] | 5 |
|
| 5 | [v-ing] what [pron] [is] that | 5 |
|
