| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is [vb pp] | 14679 |
|
| 2 | is [vb pp] [conj] | 11283 |
|
| 3 | it is [conj] | 1581 |
|
| 4 | it [vb pp] [conj] | 234 |
|
