| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is often [verb] | 364 |
|
| 2 | it is often [vb pp] | 362 |
|
| 3 | it is [adv] thought | 69 |
|
| 4 | it is [adv] thought | 56 |
|
| 5 | it be often thought | 11 |
|
| 6 | it [be] often thought | 11 |
|
| 7 | it [is] often thought | 10 |
|
| 8 | [pron] is often thought | 8 |
|
| 9 | it is often thought | 7 |
|
| 10 | [pers pn] is often thought | 7 |
|
| 11 | it is often think | 7 |
|
| 12 | it is often thought | 7 |
|
