| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [subord] it is [adv] [verb] that | 85 |
|
| 2 | [subord] it is [adv] [verb] that | 73 |
|
| 3 | [conj] it is often [verb] that | 14 |
|
| 4 | [subord] it is often [verb] [conj] | 8 |
|
| 5 | [subord] it is often [verb] that | 6 |
|
| 6 | [subord] it [is] often [verb] that | 6 |
|
| 7 | [subord] [pron] is often [verb] that | 6 |
|
| 8 | [subord] it is often [verb] [that] | 6 |
|
| 9 | [subord] it is often [verb] that | 6 |
|
| 10 | [subord] it [be] often [verb] that | 6 |
|
| 11 | [subord] it be often [verb] that | 6 |
|
| 12 | [subord] it is often [verb] that | 6 |
|
| 13 | [subord] [pers pn] is often [verb] that | 6 |
|
