| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [is] [Wh adv] [pron] [modal v] [vb infin] | 331 |
|
| 2 | [be] [Wh adv] it [modal v] [vb infin] | 34 |
|
| 3 | [is] [adv] it [modal v] [vb infin] | 33 |
|
| 4 | [is] [Wh adv] it [modal v] [verb] | 32 |
|
