| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb infin] [subord] it is [verb] | 45 |
|
| 2 | must [vb infin] [subord] it is | 20 |
|
| 3 | must [vb infin] [subord] it [verb] | 8 |
|
