| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | what [is] [vb pp] [prep] [art] | 534 |
|
| 2 | [adv prt] [is] [vb pp] [prep] [art] | 18 |
|
| 3 | [adv prt] what [is] [vb pp] [prep] | 12 |
|
