| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is [adv] [vb pp] that a | 70 |
|
| 2 | it is [adv] [vb pp] that a | 68 |
|
| 3 | it is often [vb pp] that [art] | 44 |
|
| 4 | it is often [vb pp] [conj] a | 9 |
|
| 5 | it is often [vb pp] that a | 6 |
|
| 6 | [pron] is often [vb pp] that a | 6 |
|
| 7 | it [be] often [vb pp] that a | 6 |
|
| 8 | it is often [vb pp] that a | 6 |
|
| 9 | it is often [vb pp] [that] a | 6 |
|
| 10 | it is often [verb] that a | 6 |
|
| 11 | it [is] often [vb pp] that a | 6 |
|
| 12 | it be often [vb pp] that a | 6 |
|
