| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb infin] [subord] it is [verb] | 45 |
|
| 2 | [vb infin] [subord] it is [vb pp] | 34 |
|
| 3 | [vb infin] if it is [verb] | 15 |
|
| 4 | [vb infin] [subord] it is [to-vb] | 9 |
|
| 5 | [vb infin] whether it is [verb] | 8 |
|
| 6 | [vb infin] when it is [verb] | 6 |
|
| 7 | [vb infin] unless it is [verb] | 5 |
|
| 8 | [vb infin] as it is [verb] | 5 |
|
