| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is often [vb pp] [conj] | 163 |
|
| 2 | [noun sg] it is [vb pp] [conj] | 161 |
|
| 3 | [noun sg] is often [vb pp] [conj] | 66 |
|
| 4 | [noun sg] it is often [vb pp] | 18 |
|
