| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] what it is [that] | 38 |
|
| 2 | [verb] what it [is] that | 38 |
|
| 3 | [verb] what it [is] [that] | 38 |
|
| 4 | [to-vb] what it [is] [that] | 20 |
|
| 5 | [vb infin] what it [is] [that] | 7 |
|
| 6 | [v-ing] what it [is] [that] | 5 |
|
| 7 | know what it [is] [that] | 5 |
|
