| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun sg] it is [adv] [vb pp] that | 33 |
|
| 2 | [noun sg] it is [adv] known that | 5 |
|
| 3 | [noun sg] it is well [vb pp] that | 5 |
|
| 4 | [noun sg] it is generally [vb pp] that | 5 |
|
| 5 | [noun sg] it is often [vb pp] that | 5 |
|
| 6 | [noun sg] it is [adv] assumed that | 5 |
|
